Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 1,072 10.72 10.72 2D | 271 2.71 13.43 2F | 1 0.01 13.44 2H | 635 6.35 19.79 2L | 54 0.54 20.33 2P | 8 0.08 20.41 2T | 154 1.54 21.95 2W | 8 0.08 22.03 3D | 19 0.19 22.22 4D | 2,030 20.30 42.52 4H | 177 1.77 44.29 4L | 5 0.05 44.34 4P | 12 0.12 44.46 4T | 12 0.12 44.58 4W | 66 0.66 45.24 99 | 478 4.78 50.02 AC | 1 0.01 50.03 AT | 12 0.12 50.15 BU | 9 0.09 50.24 CB | 77 0.77 51.01 CC | 44 0.44 51.45 CG | 15 0.15 51.60 CL | 1 0.01 51.61 CP | 1,001 10.01 61.62 CV | 54 0.54 62.16 CW | 32 0.32 62.48 CY | 7 0.07 62.55 DP | 3 0.03 62.58 DS | 233 2.33 64.91 EC | 9 0.09 65.00 ES | 10 0.10 65.10 EV | 2 0.02 65.12 EW | 2 0.02 65.14 FB | 6 0.06 65.20 FC | 2 0.02 65.22 GL | 4 0.04 65.26 HT | 1 0.01 65.27 IC | 71 0.71 65.98 IE | 17 0.17 66.15 LB | 10 0.10 66.25 LL | 4 0.04 66.29 MH | 11 0.11 66.40 MK | 1 0.01 66.41 MP | 3 0.03 66.44 MS | 2 0.02 66.46 MX | 1 0.01 66.47 MY | 10 0.10 66.57 NB | 5 0.05 66.62 PC | 161 1.61 68.23 PK | 1,404 14.04 82.27 PS | 69 0.69 82.96 RD | 4 0.04 83.00 RS | 200 2.00 85.00 RT | 4 0.04 85.04 S2 | 19 0.19 85.23 SD | 33 0.33 85.56 SN | 7 0.07 85.63 SV | 396 3.96 89.59 SW | 334 3.34 92.93 TB | 31 0.31 93.24 TL | 29 0.29 93.53 TM | 56 0.56 94.09 UT | 444 4.44 98.53 VN | 139 1.39 99.92 WW | 2 0.02 99.94 XT | 5 0.05 99.99 YY | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016