Frequencies for first 10,000 rows of ASC_BGN_SRVC_DT variable in pos2011 dataset : Date Center | Began | Providing | Services | Freq. Percent Cum. ------------+----------------------------------- 12 Feb 70 | 1 0.01 0.01 19 Sep 73 | 1 0.01 0.02 01 Jun 75 | 1 0.01 0.03 17 Jan 79 | 1 0.01 0.04 01 Dec 79 | 1 0.01 0.05 01 Jan 81 | 1 0.01 0.06 14 Jan 81 | 1 0.01 0.07 17 Dec 82 | 1 0.01 0.08 01 Feb 83 | 1 0.01 0.09 01 Mar 83 | 1 0.01 0.10 16 May 83 | 1 0.01 0.11 17 May 83 | 1 0.01 0.12 18 Jul 83 | 1 0.01 0.13 13 Aug 83 | 1 0.01 0.14 06 Sep 83 | 1 0.01 0.15 01 Dec 83 | 1 0.01 0.16 19 Dec 83 | 1 0.01 0.17 23 Dec 83 | 1 0.01 0.18 01 Jan 84 | 1 0.01 0.19 15 Feb 84 | 1 0.01 0.20 12 Apr 84 | 1 0.01 0.21 01 May 84 | 1 0.01 0.22 07 May 84 | 1 0.01 0.23 11 May 84 | 1 0.01 0.24 01 Jul 84 | 4 0.04 0.28 16 Jul 84 | 1 0.01 0.29 24 Aug 84 | 1 0.01 0.30 01 Sep 84 | 1 0.01 0.31 01 Oct 84 | 2 0.02 0.33 19 Nov 84 | 1 0.01 0.34 23 Nov 84 | 1 0.01 0.35 26 Nov 84 | 1 0.01 0.36 01 Dec 84 | 1 0.01 0.37 01 Jan 85 | 2 0.02 0.39 10 Jan 85 | 1 0.01 0.40 01 Mar 85 | 1 0.01 0.41 25 Mar 85 | 1 0.01 0.42 29 Mar 85 | 1 0.01 0.43 01 May 85 | 1 0.01 0.44 03 May 85 | 1 0.01 0.45 13 May 85 | 1 0.01 0.46 05 Jun 85 | 1 0.01 0.47 15 Jun 85 | 1 0.01 0.48 18 Jun 85 | 1 0.01 0.49 24 Jun 85 | 1 0.01 0.50 29 Jul 85 | 1 0.01 0.51 30 Jul 85 | 1 0.01 0.52 15 Aug 85 | 1 0.01 0.53 19 Aug 85 | 1 0.01 0.54 05 Sep 85 | 1 0.01 0.55 03 Dec 85 | 1 0.01 0.56 30 Dec 85 | 1 0.01 0.57 14 Jan 86 | 1 0.01 0.58 28 Jan 86 | 1 0.01 0.59 01 Feb 86 | 1 0.01 0.60 05 Feb 86 | 1 0.01 0.61 20 Feb 86 | 1 0.01 0.62 30 Apr 86 | 2 0.02 0.64 26 May 86 | 1 0.01 0.65 01 Jul 86 | 1 0.01 0.66 16 Sep 86 | 1 0.01 0.67 08 Oct 86 | 1 0.01 0.68 14 Oct 86 | 1 0.01 0.69 26 Oct 86 | 1 0.01 0.70 01 Jan 87 | 1 0.01 0.71 30 Jan 87 | 1 0.01 0.72 18 Mar 87 | 2 0.02 0.74 04 May 87 | 1 0.01 0.75 04 Jun 87 | 1 0.01 0.76 20 Jul 87 | 1 0.01 0.77 01 Nov 87 | 1 0.01 0.78 01 Dec 87 | 1 0.01 0.79 31 Dec 87 | 1 0.01 0.80 25 Feb 88 | 1 0.01 0.81 24 Mar 88 | 1 0.01 0.82 25 Apr 88 | 1 0.01 0.83 19 May 88 | 1 0.01 0.84 15 Sep 88 | 2 0.02 0.86 01 Nov 88 | 2 0.02 0.88 04 Jan 89 | 1 0.01 0.89 01 Feb 89 | 1 0.01 0.90 27 Feb 89 | 1 0.01 0.91 06 Apr 89 | 1 0.01 0.92 07 Aug 89 | 1 0.01 0.93 25 Aug 89 | 1 0.01 0.94 18 Oct 89 | 1 0.01 0.95 31 Oct 89 | 1 0.01 0.96 07 Nov 89 | 1 0.01 0.97 14 Mar 90 | 1 0.01 0.98 11 May 90 | 1 0.01 0.99 15 Jun 90 | 1 0.01 1.00 18 Jun 90 | 1 0.01 1.01 01 Aug 90 | 1 0.01 1.02 19 Oct 90 | 1 0.01 1.03 16 Jan 91 | 1 0.01 1.04 26 Jan 91 | 1 0.01 1.05 28 Mar 91 | 1 0.01 1.06 19 Apr 91 | 1 0.01 1.07 08 Aug 91 | 1 0.01 1.08 19 Sep 91 | 1 0.01 1.09 20 Nov 91 | 1 0.01 1.10 29 Jan 92 | 1 0.01 1.11 01 Mar 92 | 1 0.01 1.12 10 Mar 92 | 1 0.01 1.13 16 Mar 92 | 1 0.01 1.14 17 Apr 92 | 1 0.01 1.15 22 Apr 92 | 1 0.01 1.16 01 May 92 | 1 0.01 1.17 01 Jun 92 | 1 0.01 1.18 22 Sep 92 | 1 0.01 1.19 09 Oct 92 | 1 0.01 1.20 23 Oct 92 | 1 0.01 1.21 02 Nov 92 | 1 0.01 1.22 01 Jan 93 | 1 0.01 1.23 04 Jan 93 | 1 0.01 1.24 18 Feb 93 | 1 0.01 1.25 28 Apr 93 | 1 0.01 1.26 04 Feb 94 | 1 0.01 1.27 24 Feb 94 | 1 0.01 1.28 17 Mar 94 | 1 0.01 1.29 30 Mar 94 | 1 0.01 1.30 11 Jul 94 | 1 0.01 1.31 30 Sep 94 | 1 0.01 1.32 27 Oct 94 | 1 0.01 1.33 01 Dec 94 | 1 0.01 1.34 10 Jan 95 | 1 0.01 1.35 17 Feb 95 | 1 0.01 1.36 01 Apr 95 | 1 0.01 1.37 10 Apr 95 | 1 0.01 1.38 01 Jun 95 | 1 0.01 1.39 03 Jul 95 | 1 0.01 1.40 24 Oct 95 | 1 0.01 1.41 01 Dec 95 | 1 0.01 1.42 13 Dec 95 | 1 0.01 1.43 31 Dec 95 | 1 0.01 1.44 01 Jan 96 | 2 0.02 1.46 01 Feb 96 | 1 0.01 1.47 25 Mar 96 | 1 0.01 1.48 01 Apr 96 | 1 0.01 1.49 25 May 96 | 1 0.01 1.50 04 Jun 96 | 1 0.01 1.51 01 Jul 96 | 1 0.01 1.52 20 Sep 96 | 1 0.01 1.53 07 Oct 96 | 1 0.01 1.54 01 Jan 97 | 1 0.01 1.55 14 Feb 97 | 1 0.01 1.56 05 Mar 97 | 1 0.01 1.57 01 Apr 97 | 1 0.01 1.58 07 May 97 | 1 0.01 1.59 18 Jul 97 | 1 0.01 1.60 19 Aug 97 | 1 0.01 1.61 22 Aug 97 | 1 0.01 1.62 01 Jan 98 | 1 0.01 1.63 16 Jan 98 | 1 0.01 1.64 01 Feb 98 | 1 0.01 1.65 19 Feb 98 | 1 0.01 1.66 20 Mar 98 | 1 0.01 1.67 14 Apr 98 | 1 0.01 1.68 01 May 98 | 1 0.01 1.69 29 Jun 98 | 1 0.01 1.70 30 Jun 98 | 1 0.01 1.71 01 Jul 98 | 1 0.01 1.72 17 Jul 98 | 1 0.01 1.73 01 Aug 98 | 1 0.01 1.74 26 Aug 98 | 1 0.01 1.75 01 Oct 98 | 2 0.02 1.77 07 Oct 98 | 1 0.01 1.78 01 Nov 98 | 1 0.01 1.79 31 Dec 98 | 1 0.01 1.80 01 Jan 99 | 2 0.02 1.82 25 Jan 99 | 1 0.01 1.83 01 Mar 99 | 1 0.01 1.84 31 Mar 99 | 1 0.01 1.85 01 Apr 99 | 1 0.01 1.86 30 Jun 99 | 1 0.01 1.87 19 Jul 99 | 1 0.01 1.88 28 Jul 99 | 1 0.01 1.89 17 Sep 99 | 1 0.01 1.90 01 Oct 99 | 1 0.01 1.91 29 Oct 99 | 1 0.01 1.92 01 Nov 99 | 1 0.01 1.93 01 Dec 99 | 1 0.01 1.94 07 Dec 99 | 1 0.01 1.95 20 Dec 99 | 1 0.01 1.96 01 Feb 00 | 1 0.01 1.97 24 Feb 00 | 1 0.01 1.98 20 Mar 00 | 1 0.01 1.99 20 Apr 00 | 1 0.01 2.00 01 May 00 | 1 0.01 2.01 19 Jul 00 | 1 0.01 2.02 01 Aug 00 | 1 0.01 2.03 15 Sep 00 | 1 0.01 2.04 01 Oct 00 | 1 0.01 2.05 19 Dec 00 | 1 0.01 2.06 01 Jan 01 | 3 0.03 2.09 04 Jan 01 | 1 0.01 2.10 05 Jan 01 | 1 0.01 2.11 09 Feb 01 | 1 0.01 2.12 26 Feb 01 | 1 0.01 2.13 01 May 01 | 1 0.01 2.14 18 Jun 01 | 1 0.01 2.15 01 Jul 01 | 2 0.02 2.17 02 Jul 01 | 1 0.01 2.18 19 Jul 01 | 1 0.01 2.19 01 Oct 01 | 1 0.01 2.20 04 Oct 01 | 1 0.01 2.21 31 Oct 01 | 1 0.01 2.22 01 Jan 02 | 1 0.01 2.23 22 Feb 02 | 1 0.01 2.24 01 Mar 02 | 2 0.02 2.26 04 Mar 02 | 1 0.01 2.27 05 Mar 02 | 1 0.01 2.28 15 Apr 02 | 1 0.01 2.29 01 Aug 02 | 1 0.01 2.30 06 Aug 02 | 1 0.01 2.31 10 Aug 02 | 1 0.01 2.32 31 Aug 02 | 2 0.02 2.34 01 Sep 02 | 1 0.01 2.35 18 Sep 02 | 1 0.01 2.36 16 Oct 02 | 1 0.01 2.37 01 Nov 02 | 2 0.02 2.39 01 Dec 02 | 1 0.01 2.40 02 Dec 02 | 1 0.01 2.41 31 Dec 02 | 1 0.01 2.42 10 Jan 03 | 1 0.01 2.43 07 Apr 03 | 1 0.01 2.44 08 Apr 03 | 1 0.01 2.45 14 Apr 03 | 1 0.01 2.46 23 Apr 03 | 1 0.01 2.47 01 Jun 03 | 1 0.01 2.48 03 Jun 03 | 1 0.01 2.49 08 Jun 03 | 1 0.01 2.50 01 Aug 03 | 1 0.01 2.51 01 Sep 03 | 1 0.01 2.52 01 Oct 03 | 1 0.01 2.53 10 Oct 03 | 1 0.01 2.54 01 Dec 03 | 2 0.02 2.56 01 Jan 04 | 1 0.01 2.57 15 Feb 04 | 1 0.01 2.58 05 Mar 04 | 1 0.01 2.59 24 Mar 04 | 1 0.01 2.60 30 Mar 04 | 1 0.01 2.61 01 Apr 04 | 1 0.01 2.62 24 May 04 | 1 0.01 2.63 28 May 04 | 1 0.01 2.64 01 Jun 04 | 1 0.01 2.65 17 Jun 04 | 1 0.01 2.66 12 Jul 04 | 1 0.01 2.67 01 Aug 04 | 1 0.01 2.68 26 Oct 04 | 1 0.01 2.69 09 Nov 04 | 2 0.02 2.71 12 Nov 04 | 1 0.01 2.72 15 Dec 04 | 1 0.01 2.73 28 Dec 04 | 1 0.01 2.74 13 Jan 05 | 1 0.01 2.75 31 Jan 05 | 1 0.01 2.76 23 Feb 05 | 1 0.01 2.77 24 Feb 05 | 1 0.01 2.78 17 Mar 05 | 1 0.01 2.79 01 Apr 05 | 3 0.03 2.82 19 Apr 05 | 1 0.01 2.83 20 Apr 05 | 1 0.01 2.84 30 Apr 05 | 1 0.01 2.85 01 Jun 05 | 1 0.01 2.86 16 Jun 05 | 1 0.01 2.87 11 Jul 05 | 1 0.01 2.88 04 Aug 05 | 1 0.01 2.89 24 Aug 05 | 1 0.01 2.90 26 Aug 05 | 1 0.01 2.91 27 Oct 05 | 1 0.01 2.92 02 Nov 05 | 1 0.01 2.93 08 Nov 05 | 1 0.01 2.94 05 Dec 05 | 1 0.01 2.95 14 Dec 05 | 1 0.01 2.96 22 Dec 05 | 1 0.01 2.97 29 Dec 05 | 1 0.01 2.98 01 Jan 06 | 2 0.02 3.00 04 Jan 06 | 1 0.01 3.01 06 Mar 06 | 1 0.01 3.02 31 May 06 | 1 0.01 3.03 21 Jun 06 | 1 0.01 3.04 30 Jun 06 | 1 0.01 3.05 01 Jul 06 | 1 0.01 3.06 12 Jul 06 | 1 0.01 3.07 20 Jul 06 | 1 0.01 3.08 10 Aug 06 | 1 0.01 3.09 16 Aug 06 | 1 0.01 3.10 01 Sep 06 | 1 0.01 3.11 29 Sep 06 | 2 0.02 3.13 11 Oct 06 | 1 0.01 3.14 20 Oct 06 | 1 0.01 3.15 25 Oct 06 | 1 0.01 3.16 01 Nov 06 | 1 0.01 3.17 15 Nov 06 | 1 0.01 3.18 01 Dec 06 | 1 0.01 3.19 05 Dec 06 | 1 0.01 3.20 06 Dec 06 | 1 0.01 3.21 07 Dec 06 | 1 0.01 3.22 14 Dec 06 | 1 0.01 3.23 01 Jan 07 | 1 0.01 3.24 31 Jan 07 | 1 0.01 3.25 01 Mar 07 | 1 0.01 3.26 22 Mar 07 | 1 0.01 3.27 28 Mar 07 | 1 0.01 3.28 05 Apr 07 | 1 0.01 3.29 25 Apr 07 | 1 0.01 3.30 14 Jul 07 | 1 0.01 3.31 07 Aug 07 | 1 0.01 3.32 28 Sep 07 | 1 0.01 3.33 01 Oct 07 | 3 0.03 3.36 07 Nov 07 | 1 0.01 3.37 15 Nov 07 | 1 0.01 3.38 19 Nov 07 | 1 0.01 3.39 29 Nov 07 | 1 0.01 3.40 01 Mar 08 | 1 0.01 3.41 05 Mar 08 | 1 0.01 3.42 24 Mar 08 | 1 0.01 3.43 26 Mar 08 | 1 0.01 3.44 01 Apr 08 | 1 0.01 3.45 18 Apr 08 | 1 0.01 3.46 01 May 08 | 1 0.01 3.47 05 May 08 | 1 0.01 3.48 27 Jun 08 | 1 0.01 3.49 10 Jul 08 | 1 0.01 3.50 28 Jul 08 | 1 0.01 3.51 25 Aug 08 | 1 0.01 3.52 25 Sep 08 | 1 0.01 3.53 01 Oct 08 | 1 0.01 3.54 26 May 09 | 1 0.01 3.55 15 Jun 09 | 1 0.01 3.56 07 Jul 09 | 1 0.01 3.57 16 Jul 09 | 1 0.01 3.58 01 Sep 09 | 1 0.01 3.59 01 Oct 09 | 1 0.01 3.60 26 Oct 09 | 1 0.01 3.61 01 Dec 09 | 2 0.02 3.63 11 Jan 10 | 1 0.01 3.64 15 Jan 10 | 1 0.01 3.65 26 Jan 10 | 1 0.01 3.66 02 Feb 10 | 1 0.01 3.67 09 Mar 10 | 1 0.01 3.68 22 Mar 10 | 1 0.01 3.69 26 May 10 | 1 0.01 3.70 01 Sep 10 | 1 0.01 3.71 08 Oct 10 | 1 0.01 3.72 27 Oct 10 | 1 0.01 3.73 05 Nov 10 | 1 0.01 3.74 09 Nov 10 | 1 0.01 3.75 22 Dec 10 | 1 0.01 3.76 08 Mar 11 | 1 0.01 3.77 01 Aug 11 | 1 0.01 3.78 03 Aug 11 | 1 0.01 3.79 . | 9,621 96.21 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 19 Apr 2019