Frequencies for ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 4 0.56 0.56 *** | 430 60.06 60.61 40S | 2 0.28 60.89 44P | 1 0.14 61.03 600 | 3 0.42 61.45 720 | 1 0.14 61.59 999 | 103 14.39 75.98 ARO | 4 0.56 76.54 AST | 3 0.42 76.96 B22 | 6 0.84 77.79 B23 | 3 0.42 78.21 B30 | 1 0.14 78.35 BII | 3 0.42 78.77 BRO | 1 0.14 78.91 C10 | 4 0.56 79.47 C6V | 1 0.14 79.61 C97 | 1 0.14 79.75 CHK | 3 0.42 80.17 COE | 1 0.14 80.31 COF | 19 2.65 82.96 COH | 1 0.14 83.10 COL | 1 0.14 83.24 CON | 2 0.28 83.52 CRV | 1 0.14 83.66 CVS | 2 0.28 83.94 CWS | 1 0.14 84.08 D21 | 1 0.14 84.22 DAK | 1 0.14 84.36 EPR | 5 0.70 85.06 GCK | 1 0.14 85.20 GM4 | 4 0.56 85.75 HTP | 5 0.70 86.45 JEE | 4 0.56 87.01 JMY | 1 0.14 87.15 MHV | 6 0.84 87.99 MMX | 1 0.14 88.13 MNS | 1 0.14 88.27 MON | 9 1.26 89.53 MWG | 1 0.14 89.66 NPR | 1 0.14 89.80 P20 | 1 0.14 89.94 PFI | 11 1.54 91.48 PMN | 1 0.14 91.62 QST | 1 0.14 91.76 RMV | 2 0.28 92.04 RNG | 2 0.28 92.32 ROD | 3 0.42 92.74 RUN | 4 0.56 93.30 RV4 | 3 0.42 93.72 S | 4 0.56 94.27 S/V | 1 0.14 94.41 S15 | 1 0.14 94.55 SDK | 3 0.42 94.97 SMR | 5 0.70 95.67 SPO | 3 0.42 96.09 SPT | 1 0.14 96.23 SS | 1 0.14 96.37 TRK | 2 0.28 96.65 TRO | 6 0.84 97.49 UNI | 1 0.14 97.63 VAN | 10 1.40 99.02 VOF | 2 0.28 99.30 VOY | 1 0.14 99.44 VWG | 2 0.28 99.72 X44 | 1 0.14 99.86 XCB | 1 0.14 100.00 ------------+----------------------------------- Total | 716 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016