Frequencies for ser_tr variable in person dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 141 17.28 17.28 *** | 445 54.53 71.81 30S | 9 1.10 72.92 40S | 1 0.12 73.04 600 | 1 0.12 73.16 700 | 1 0.12 73.28 70S | 3 0.37 73.65 999 | 101 12.38 86.03 ARO | 1 0.12 86.15 AST | 1 0.12 86.27 B22 | 4 0.49 86.76 B23 | 1 0.12 86.89 B30 | 2 0.25 87.13 C10 | 1 0.12 87.25 CAL | 1 0.12 87.38 CHK | 2 0.25 87.62 CMP | 1 0.12 87.75 COF | 8 0.98 88.73 COL | 1 0.12 88.85 COM | 1 0.12 88.97 CON | 5 0.61 89.58 CTV | 23 2.82 92.40 CVS | 1 0.12 92.52 DRW | 1 0.12 92.65 ECO | 8 0.98 93.63 ELC | 1 0.12 93.75 ENV | 1 0.12 93.87 I35 | 1 0.12 94.00 JEE | 2 0.25 94.24 LIB | 2 0.25 94.49 MMX | 2 0.25 94.73 OFF | 2 0.25 94.98 PRT | 1 0.12 95.10 RAI | 1 0.12 95.22 RMV | 1 0.12 95.34 RNG | 10 1.23 96.57 RPC | 1 0.12 96.69 S | 3 0.37 97.06 S/V | 2 0.25 97.30 SAF | 1 0.12 97.43 SIE | 1 0.12 97.55 SRW | 1 0.12 97.67 SS | 3 0.37 98.04 STE | 2 0.25 98.28 TAC | 5 0.61 98.90 TRK | 1 0.12 99.02 TUN | 1 0.12 99.14 VAN | 2 0.25 99.39 VOF | 1 0.12 99.51 W/T | 2 0.25 99.75 WIN | 1 0.12 99.88 YUK | 1 0.12 100.00 ------------+----------------------------------- Total | 816 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016