Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 671 6.71 6.71 2D | 61 0.61 7.32 2H | 178 1.78 9.10 2L | 22 0.22 9.32 2P | 8 0.08 9.40 2T | 1 0.01 9.41 2W | 40 0.40 9.81 3C | 63 0.63 10.44 3D | 1 0.01 10.45 3P | 12 0.12 10.57 4B | 3 0.03 10.60 4C | 338 3.38 13.98 4D | 2,590 25.90 39.88 4H | 68 0.68 40.56 4L | 4 0.04 40.60 4P | 12 0.12 40.72 4T | 1 0.01 40.73 4W | 295 2.95 43.68 5D | 7 0.07 43.75 99 | 400 4.00 47.75 AT | 54 0.54 48.29 BU | 39 0.39 48.68 C4 | 4 0.04 48.72 CB | 41 0.41 49.13 CC | 57 0.57 49.70 CG | 28 0.28 49.98 CH | 3 0.03 50.01 CP | 484 4.84 54.85 CV | 70 0.70 55.55 CW | 404 4.04 59.59 DS | 342 3.42 63.01 EC | 9 0.09 63.10 ES | 182 1.82 64.92 EV | 4 0.04 64.96 FC | 1 0.01 64.97 HR | 1 0.01 64.98 HT | 1 0.01 64.99 IC | 34 0.34 65.33 IE | 2 0.02 65.35 LB | 9 0.09 65.44 LL | 1 0.01 65.45 LM | 3 0.03 65.48 MH | 11 0.11 65.59 MM | 1 0.01 65.60 MP | 17 0.17 65.77 MS | 9 0.09 65.86 MX | 4 0.04 65.90 MY | 5 0.05 65.95 NB | 1 0.01 65.96 PC | 223 2.23 68.19 PK | 536 5.36 73.55 PS | 68 0.68 74.23 RC | 3 0.03 74.26 RD | 5 0.05 74.31 RS | 581 5.81 80.12 RT | 12 0.12 80.24 S1 | 2 0.02 80.26 S2 | 11 0.11 80.37 SV | 368 3.68 84.05 SW | 77 0.77 84.82 TB | 25 0.25 85.07 TL | 9 0.09 85.16 TM | 50 0.50 85.66 UT | 1,393 13.93 99.59 VN | 6 0.06 99.65 YY | 35 0.35 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016