Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 923 9.23 9.23 2D | 312 3.12 12.35 2H | 570 5.70 18.05 2L | 45 0.45 18.50 2P | 9 0.09 18.59 2T | 115 1.15 19.74 2W | 25 0.25 19.99 3D | 18 0.18 20.17 4D | 2,167 21.67 41.84 4H | 126 1.26 43.10 4L | 11 0.11 43.21 4P | 23 0.23 43.44 4T | 15 0.15 43.59 4W | 66 0.66 44.25 5D | 1 0.01 44.26 8V | 4 0.04 44.30 99 | 368 3.68 47.98 AT | 8 0.08 48.06 BU | 45 0.45 48.51 CB | 61 0.61 49.12 CC | 52 0.52 49.64 CG | 13 0.13 49.77 CH | 1 0.01 49.78 CL | 2 0.02 49.80 CP | 979 9.79 59.59 CV | 75 0.75 60.34 CW | 24 0.24 60.58 CY | 6 0.06 60.64 DP | 2 0.02 60.66 DS | 231 2.31 62.97 EC | 8 0.08 63.05 EN | 1 0.01 63.06 ES | 5 0.05 63.11 FB | 4 0.04 63.15 FC | 4 0.04 63.19 GG | 1 0.01 63.20 GL | 3 0.03 63.23 HB | 2 0.02 63.25 HT | 4 0.04 63.29 IC | 81 0.81 64.10 IE | 18 0.18 64.28 LB | 4 0.04 64.32 LL | 16 0.16 64.48 MH | 8 0.08 64.56 MS | 6 0.06 64.62 MX | 3 0.03 64.65 MY | 8 0.08 64.73 NB | 3 0.03 64.76 PC | 219 2.19 66.95 PK | 1,488 14.88 81.83 PS | 95 0.95 82.78 RD | 3 0.03 82.81 RS | 162 1.62 84.43 RT | 7 0.07 84.50 S2 | 31 0.31 84.81 SD | 8 0.08 84.89 SN | 5 0.05 84.94 SV | 468 4.68 89.62 SW | 242 2.42 92.04 T | 1 0.01 92.05 TB | 23 0.23 92.28 TL | 38 0.38 92.66 TM | 58 0.58 93.24 UT | 524 5.24 98.48 VN | 148 1.48 99.96 VW | 2 0.02 99.98 YY | 2 0.02 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016