Frequencies for vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 222 17.24 17.24 2D | 92 7.14 24.38 2H | 94 7.30 31.68 2L | 4 0.31 31.99 2T | 1 0.08 32.07 2W | 1 0.08 32.14 3C | 1 0.08 32.22 3D | 6 0.47 32.69 4C | 2 0.16 32.84 4D | 243 18.87 51.71 4H | 4 0.31 52.02 4W | 9 0.70 52.72 99 | 188 14.60 67.31 BU | 3 0.23 67.55 CB | 7 0.54 68.09 CC | 4 0.31 68.40 CG | 5 0.39 68.79 CP | 118 9.16 77.95 DP | 4 0.31 78.26 DS | 6 0.47 78.73 EC | 2 0.16 78.88 HT | 1 0.08 78.96 IC | 1 0.08 79.04 IE | 2 0.16 79.19 MY | 1 0.08 79.27 NB | 2 0.16 79.43 PC | 7 0.54 79.97 PK | 42 3.26 83.23 PS | 3 0.23 83.46 RS | 22 1.71 85.17 RT | 2 0.16 85.33 SV | 34 2.64 87.97 SW | 50 3.88 91.85 TB | 5 0.39 92.24 TL | 1 0.08 92.31 TM | 3 0.23 92.55 UT | 81 6.29 98.84 VN | 15 1.16 100.00 ------------+----------------------------------- Total | 1,288 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016