Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 767 7.67 7.67 2D | 182 1.82 9.49 2H | 445 4.45 13.94 2L | 15 0.15 14.09 2P | 23 0.23 14.32 2T | 50 0.50 14.82 2W | 76 0.76 15.58 3C | 23 0.23 15.81 3D | 2 0.02 15.83 4C | 5 0.05 15.88 4D | 2,360 23.60 39.48 4H | 117 1.17 40.65 4L | 5 0.05 40.70 4P | 25 0.25 40.95 4T | 2 0.02 40.97 4W | 436 4.36 45.33 99 | 642 6.42 51.75 AT | 12 0.12 51.87 BU | 69 0.69 52.56 CB | 105 1.05 53.61 CC | 56 0.56 54.17 CG | 20 0.20 54.37 CH | 2 0.02 54.39 CM | 1 0.01 54.40 CP | 778 7.78 62.18 CV | 69 0.69 62.87 CW | 21 0.21 63.08 DP | 3 0.03 63.11 DS | 287 2.87 65.98 EC | 13 0.13 66.11 ES | 102 1.02 67.13 EV | 1 0.01 67.14 FB | 8 0.08 67.22 FC | 4 0.04 67.26 GL | 5 0.05 67.31 HB | 4 0.04 67.35 HR | 1 0.01 67.36 HT | 3 0.03 67.39 IC | 105 1.05 68.44 IE | 16 0.16 68.60 LB | 4 0.04 68.64 LL | 5 0.05 68.69 MH | 17 0.17 68.86 MP | 53 0.53 69.39 MS | 3 0.03 69.42 MX | 4 0.04 69.46 MY | 5 0.05 69.51 PC | 339 3.39 72.90 PK | 1,372 13.72 86.62 PS | 106 1.06 87.68 RD | 2 0.02 87.70 RS | 183 1.83 89.53 RT | 1 0.01 89.54 S1 | 2 0.02 89.56 S2 | 133 1.33 90.89 SD | 9 0.09 90.98 SN | 1 0.01 90.99 SV | 354 3.54 94.53 SW | 173 1.73 96.26 T | 1 0.01 96.27 TB | 31 0.31 96.58 TL | 25 0.25 96.83 TM | 75 0.75 97.58 UT | 181 1.81 99.39 VN | 57 0.57 99.96 YY | 4 0.04 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016