Frequencies for first 10,000 rows of vin_bt variable in person dataset : vin_bt | Freq. Percent Cum. ------------+----------------------------------- | 687 6.87 6.87 2D | 122 1.22 8.09 2H | 325 3.25 11.34 2L | 24 0.24 11.58 2P | 23 0.23 11.81 2T | 22 0.22 12.03 2W | 25 0.25 12.28 3C | 68 0.68 12.96 3D | 7 0.07 13.03 4C | 190 1.90 14.93 4D | 2,658 26.58 41.51 4H | 49 0.49 42.00 4L | 3 0.03 42.03 4P | 48 0.48 42.51 4T | 1 0.01 42.52 4W | 237 2.37 44.89 99 | 485 4.85 49.74 AT | 15 0.15 49.89 BU | 32 0.32 50.21 CB | 40 0.40 50.61 CC | 50 0.50 51.11 CG | 38 0.38 51.49 CP | 680 6.80 58.29 CV | 98 0.98 59.27 CW | 130 1.30 60.57 DP | 4 0.04 60.61 DS | 284 2.84 63.45 EC | 12 0.12 63.57 EN | 2 0.02 63.59 ES | 27 0.27 63.86 EV | 7 0.07 63.93 EW | 5 0.05 63.98 FB | 3 0.03 64.01 FC | 1 0.01 64.02 GL | 1 0.01 64.03 HR | 1 0.01 64.04 IC | 91 0.91 64.95 IE | 10 0.10 65.05 LL | 3 0.03 65.08 MH | 14 0.14 65.22 MM | 1 0.01 65.23 MP | 1 0.01 65.24 MS | 3 0.03 65.27 MX | 5 0.05 65.32 MY | 5 0.05 65.37 PC | 318 3.18 68.55 PK | 863 8.63 77.18 PS | 147 1.47 78.65 RD | 4 0.04 78.69 RS | 272 2.72 81.41 RT | 4 0.04 81.45 S2 | 1 0.01 81.46 SD | 3 0.03 81.49 SN | 4 0.04 81.53 SV | 534 5.34 86.87 SW | 205 2.05 88.92 TB | 4 0.04 88.96 TL | 15 0.15 89.11 TM | 60 0.60 89.71 UT | 958 9.58 99.29 VN | 52 0.52 99.81 YY | 19 0.19 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016