Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 639 6.39 6.39 2D | 109 1.09 7.48 2H | 241 2.41 9.89 2L | 21 0.21 10.10 2P | 25 0.25 10.35 2T | 10 0.10 10.45 2W | 37 0.37 10.82 3C | 94 0.94 11.76 3P | 4 0.04 11.80 4B | 1 0.01 11.81 4C | 301 3.01 14.82 4D | 2,519 25.19 40.01 4H | 43 0.43 40.44 4P | 44 0.44 40.88 4T | 1 0.01 40.89 4W | 274 2.74 43.63 5D | 2 0.02 43.65 99 | 500 5.00 48.65 AT | 21 0.21 48.86 BU | 77 0.77 49.63 C4 | 1 0.01 49.64 CB | 35 0.35 49.99 CC | 63 0.63 50.62 CG | 21 0.21 50.83 CH | 5 0.05 50.88 CP | 596 5.96 56.84 CV | 61 0.61 57.45 CW | 236 2.36 59.81 DP | 3 0.03 59.84 DS | 296 2.96 62.80 EC | 5 0.05 62.85 EN | 1 0.01 62.86 ES | 10 0.10 62.96 EW | 2 0.02 62.98 FB | 1 0.01 62.99 FC | 3 0.03 63.02 GL | 1 0.01 63.03 IC | 145 1.45 64.48 IE | 13 0.13 64.61 LB | 1 0.01 64.62 LL | 1 0.01 64.63 MH | 6 0.06 64.69 MK | 1 0.01 64.70 MM | 1 0.01 64.71 MP | 1 0.01 64.72 MS | 4 0.04 64.76 MX | 8 0.08 64.84 MY | 14 0.14 64.98 NB | 2 0.02 65.00 PC | 267 2.67 67.67 PK | 738 7.38 75.05 PS | 107 1.07 76.12 RD | 3 0.03 76.15 RS | 340 3.40 79.55 RT | 5 0.05 79.60 S2 | 2 0.02 79.62 SD | 1 0.01 79.63 SN | 1 0.01 79.64 SV | 571 5.71 85.35 SW | 201 2.01 87.36 TB | 10 0.10 87.46 TL | 9 0.09 87.55 TM | 53 0.53 88.08 UT | 1,162 11.62 99.70 VN | 18 0.18 99.88 YY | 12 0.12 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016