Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 622 6.22 6.22 2D | 58 0.58 6.80 2H | 197 1.97 8.77 2L | 18 0.18 8.95 2P | 19 0.19 9.14 2T | 5 0.05 9.19 2W | 28 0.28 9.47 3C | 70 0.70 10.17 3D | 1 0.01 10.18 3P | 9 0.09 10.27 4B | 1 0.01 10.28 4C | 330 3.30 13.58 4D | 2,629 26.29 39.87 4H | 36 0.36 40.23 4P | 16 0.16 40.39 4T | 1 0.01 40.40 4W | 295 2.95 43.35 5D | 6 0.06 43.41 99 | 498 4.98 48.39 AC | 1 0.01 48.40 AT | 40 0.40 48.80 BU | 17 0.17 48.97 C4 | 7 0.07 49.04 CB | 43 0.43 49.47 CC | 54 0.54 50.01 CG | 28 0.28 50.29 CH | 1 0.01 50.30 CP | 515 5.15 55.45 CS | 1 0.01 55.46 CV | 80 0.80 56.26 CW | 366 3.66 59.92 DS | 348 3.48 63.40 EC | 14 0.14 63.54 EN | 1 0.01 63.55 ES | 104 1.04 64.59 FC | 3 0.03 64.62 GG | 3 0.03 64.65 GL | 1 0.01 64.66 IC | 56 0.56 65.22 IE | 5 0.05 65.27 LB | 23 0.23 65.50 LL | 1 0.01 65.51 MH | 2 0.02 65.53 MS | 2 0.02 65.55 MX | 10 0.10 65.65 MY | 26 0.26 65.91 PC | 292 2.92 68.83 PK | 558 5.58 74.41 PS | 92 0.92 75.33 RD | 3 0.03 75.36 RS | 466 4.66 80.02 RT | 4 0.04 80.06 S1 | 3 0.03 80.09 S2 | 14 0.14 80.23 SN | 2 0.02 80.25 SV | 411 4.11 84.36 SW | 71 0.71 85.07 T | 1 0.01 85.08 TB | 16 0.16 85.24 TL | 12 0.12 85.36 TM | 48 0.48 85.84 UT | 1,400 14.00 99.84 VN | 6 0.06 99.90 VW | 1 0.01 99.91 YY | 9 0.09 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016