Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 695 6.95 6.95 2D | 170 1.70 8.65 2H | 377 3.77 12.42 2L | 29 0.29 12.71 2P | 21 0.21 12.92 2T | 19 0.19 13.11 2W | 26 0.26 13.37 3C | 91 0.91 14.28 3D | 2 0.02 14.30 4C | 151 1.51 15.81 4D | 2,403 24.03 39.84 4H | 47 0.47 40.31 4L | 5 0.05 40.36 4P | 53 0.53 40.89 4T | 3 0.03 40.92 4W | 183 1.83 42.75 99 | 498 4.98 47.73 AC | 1 0.01 47.74 AT | 16 0.16 47.90 BU | 50 0.50 48.40 CB | 60 0.60 49.00 CC | 44 0.44 49.44 CG | 38 0.38 49.82 CP | 742 7.42 57.24 CV | 86 0.86 58.10 CW | 75 0.75 58.85 DP | 3 0.03 58.88 DS | 300 3.00 61.88 EC | 12 0.12 62.00 EN | 1 0.01 62.01 ES | 34 0.34 62.35 FB | 1 0.01 62.36 FC | 8 0.08 62.44 GL | 5 0.05 62.49 IC | 80 0.80 63.29 IE | 8 0.08 63.37 LL | 1 0.01 63.38 LM | 3 0.03 63.41 MH | 1 0.01 63.42 MX | 2 0.02 63.44 MY | 34 0.34 63.78 NB | 2 0.02 63.80 PC | 354 3.54 67.34 PK | 999 9.99 77.33 PS | 128 1.28 78.61 RD | 5 0.05 78.66 RS | 250 2.50 81.16 RT | 4 0.04 81.20 S2 | 12 0.12 81.32 SD | 3 0.03 81.35 SV | 564 5.64 86.99 SW | 221 2.21 89.20 T | 2 0.02 89.22 TB | 21 0.21 89.43 TL | 10 0.10 89.53 TM | 85 0.85 90.38 UT | 908 9.08 99.46 VN | 44 0.44 99.90 YY | 10 0.10 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016