Frequencies for ser_tr variable in person dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 251 19.58 19.58 *** | 662 51.64 71.22 40S | 2 0.16 71.37 44P | 2 0.16 71.53 600 | 3 0.23 71.76 720 | 1 0.08 71.84 999 | 132 10.30 82.14 ARO | 3 0.23 82.37 AST | 3 0.23 82.61 B22 | 7 0.55 83.15 B23 | 6 0.47 83.62 B30 | 1 0.08 83.70 BII | 3 0.23 83.93 BRO | 1 0.08 84.01 C10 | 5 0.39 84.40 C6V | 1 0.08 84.48 C97 | 1 0.08 84.56 CHK | 3 0.23 84.79 COE | 2 0.16 84.95 COF | 20 1.56 86.51 COH | 2 0.16 86.66 COL | 1 0.08 86.74 CON | 2 0.16 86.90 CRV | 1 0.08 86.97 CVS | 2 0.16 87.13 CWS | 1 0.08 87.21 D21 | 1 0.08 87.29 DAK | 1 0.08 87.36 EPR | 7 0.55 87.91 GCK | 1 0.08 87.99 GM4 | 7 0.55 88.53 HTP | 8 0.62 89.16 JEE | 7 0.55 89.70 JMY | 5 0.39 90.09 MHV | 6 0.47 90.56 MMX | 1 0.08 90.64 MNS | 1 0.08 90.72 MON | 9 0.70 91.42 MWG | 1 0.08 91.50 NPR | 1 0.08 91.58 P20 | 2 0.16 91.73 PFI | 15 1.17 92.90 PMN | 1 0.08 92.98 QST | 2 0.16 93.14 RMV | 4 0.31 93.45 RNG | 2 0.16 93.60 ROD | 5 0.39 93.99 RUN | 5 0.39 94.38 RV4 | 8 0.62 95.01 S | 5 0.39 95.40 S/V | 1 0.08 95.48 S15 | 1 0.08 95.55 SDK | 5 0.39 95.94 SMR | 6 0.47 96.41 SPO | 6 0.47 96.88 SPT | 4 0.31 97.19 SS | 2 0.16 97.35 TRK | 2 0.16 97.50 TRO | 9 0.70 98.21 UNI | 1 0.08 98.28 VAN | 10 0.78 99.06 VOF | 2 0.16 99.22 VOY | 3 0.23 99.45 VWG | 2 0.16 99.61 X44 | 1 0.08 99.69 XCB | 4 0.31 100.00 ------------+----------------------------------- Total | 1,282 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016