Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 753 7.53 7.53 2D | 184 1.84 9.37 2H | 428 4.28 13.65 2L | 40 0.40 14.05 2P | 29 0.29 14.34 2T | 31 0.31 14.65 2W | 37 0.37 15.02 3C | 102 1.02 16.04 3D | 3 0.03 16.07 3P | 1 0.01 16.08 4B | 1 0.01 16.09 4C | 69 0.69 16.78 4D | 2,352 23.52 40.30 4H | 52 0.52 40.82 4L | 6 0.06 40.88 4P | 33 0.33 41.21 4T | 3 0.03 41.24 4W | 128 1.28 42.52 99 | 484 4.84 47.36 AT | 16 0.16 47.52 BU | 32 0.32 47.84 CB | 47 0.47 48.31 CC | 56 0.56 48.87 CG | 22 0.22 49.09 CL | 11 0.11 49.20 CP | 673 6.73 55.93 CV | 68 0.68 56.61 CW | 62 0.62 57.23 DP | 1 0.01 57.24 DS | 305 3.05 60.29 EC | 10 0.10 60.39 EN | 3 0.03 60.42 ES | 14 0.14 60.56 EV | 3 0.03 60.59 FB | 1 0.01 60.60 FC | 2 0.02 60.62 GL | 2 0.02 60.64 HT | 4 0.04 60.68 IC | 92 0.92 61.60 IE | 8 0.08 61.68 LL | 14 0.14 61.82 MH | 11 0.11 61.93 MP | 7 0.07 62.00 MS | 3 0.03 62.03 MX | 6 0.06 62.09 MY | 15 0.15 62.24 NB | 2 0.02 62.26 PC | 345 3.45 65.71 PK | 1,047 10.47 76.18 PN | 1 0.01 76.19 PS | 124 1.24 77.43 RS | 239 2.39 79.82 RT | 5 0.05 79.87 S2 | 20 0.20 80.07 SN | 4 0.04 80.11 SV | 752 7.52 87.63 SW | 200 2.00 89.63 T | 2 0.02 89.65 TB | 23 0.23 89.88 TL | 19 0.19 90.07 TM | 76 0.76 90.83 UT | 826 8.26 99.09 VN | 79 0.79 99.88 WW | 1 0.01 99.89 YY | 11 0.11 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016