Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 757 7.57 7.57 2D | 47 0.47 8.04 2H | 142 1.42 9.46 2L | 20 0.20 9.66 2P | 8 0.08 9.74 2T | 6 0.06 9.80 2W | 48 0.48 10.28 3C | 60 0.60 10.88 3P | 16 0.16 11.04 4B | 7 0.07 11.11 4C | 342 3.42 14.53 4D | 2,521 25.21 39.74 4H | 71 0.71 40.45 4P | 23 0.23 40.68 4W | 264 2.64 43.32 5D | 2 0.02 43.34 99 | 444 4.44 47.78 AT | 42 0.42 48.20 BU | 68 0.68 48.88 C4 | 5 0.05 48.93 CB | 42 0.42 49.35 CC | 41 0.41 49.76 CG | 42 0.42 50.18 CH | 4 0.04 50.22 CP | 491 4.91 55.13 CV | 82 0.82 55.95 CW | 468 4.68 60.63 DS | 326 3.26 63.89 EC | 12 0.12 64.01 EN | 4 0.04 64.05 ES | 145 1.45 65.50 FC | 1 0.01 65.51 GG | 1 0.01 65.52 GL | 3 0.03 65.55 IC | 66 0.66 66.21 IE | 4 0.04 66.25 LB | 29 0.29 66.54 LL | 6 0.06 66.60 MH | 4 0.04 66.64 MP | 3 0.03 66.67 MS | 7 0.07 66.74 MX | 3 0.03 66.77 MY | 11 0.11 66.88 PC | 274 2.74 69.62 PK | 485 4.85 74.47 PS | 62 0.62 75.09 RC | 12 0.12 75.21 RD | 5 0.05 75.26 RS | 522 5.22 80.48 RT | 8 0.08 80.56 S2 | 5 0.05 80.61 SN | 1 0.01 80.62 SV | 336 3.36 83.98 SW | 70 0.70 84.68 T | 3 0.03 84.71 TB | 15 0.15 84.86 TL | 10 0.10 84.96 TM | 26 0.26 85.22 UT | 1,420 14.20 99.42 VN | 16 0.16 99.58 YY | 42 0.42 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016