Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 28 0.28 0.28 *** | 6,344 63.44 63.72 150 | 1 0.01 63.73 200 | 2 0.02 63.75 20S | 4 0.04 63.79 30S | 2 0.02 63.81 4/5 | 1 0.01 63.82 40S | 17 0.17 63.99 44P | 22 0.22 64.21 600 | 40 0.40 64.61 620 | 2 0.02 64.63 70S | 1 0.01 64.64 720 | 16 0.16 64.80 80S | 6 0.06 64.86 830 | 2 0.02 64.88 90S | 29 0.29 65.17 910 | 3 0.03 65.20 920 | 13 0.13 65.33 930 | 1 0.01 65.34 937 | 1 0.01 65.35 940 | 4 0.04 65.39 990 | 3 0.03 65.42 999 | 571 5.71 71.13 ACL | 1 0.01 71.14 ARO | 16 0.16 71.30 AST | 32 0.32 71.62 AVL | 2 0.02 71.64 B20 | 7 0.07 71.71 B22 | 8 0.08 71.79 B23 | 1 0.01 71.80 B25 | 6 0.06 71.86 B26 | 5 0.05 71.91 B30 | 7 0.07 71.98 B40 | 3 0.03 72.01 BRO | 3 0.03 72.04 BVN | 2 0.02 72.06 C10 | 40 0.40 72.46 C15 | 13 0.13 72.59 C20 | 16 0.16 72.75 C25 | 7 0.07 72.82 C30 | 5 0.05 72.87 C35 | 2 0.02 72.89 C60 | 1 0.01 72.90 C65 | 1 0.01 72.91 C6V | 2 0.02 72.93 C96 | 1 0.01 72.94 C97 | 2 0.02 72.96 CAB | 1 0.01 72.97 CAR | 1 0.01 72.98 CCH | 1 0.01 72.99 CGS | 1 0.01 73.00 CHA | 3 0.03 73.03 CHK | 51 0.51 73.54 CLU | 1 0.01 73.55 CNV | 3 0.03 73.58 COE | 32 0.32 73.90 COF | 364 3.64 77.54 COH | 5 0.05 77.59 COL | 8 0.08 77.67 COM | 5 0.05 77.72 CON | 330 3.30 81.02 CSC | 1 0.01 81.03 CSR | 8 0.08 81.11 CTS | 2 0.02 81.13 CTV | 25 0.25 81.38 CVS | 6 0.06 81.44 CWS | 2 0.02 81.46 D10 | 3 0.03 81.49 D15 | 5 0.05 81.54 D20 | 7 0.07 81.61 D21 | 10 0.10 81.71 D30 | 3 0.03 81.74 D51 | 1 0.01 81.75 D5I | 4 0.04 81.79 DAK | 63 0.63 82.42 DEN | 3 0.03 82.45 DIS | 6 0.06 82.51 DRW | 19 0.19 82.70 ECO | 6 0.06 82.76 ENV | 3 0.03 82.79 EPR | 3 0.03 82.82 EPT | 1 0.01 82.83 ETV | 1 0.01 82.84 EXP | 4 0.04 82.88 F/E | 1 0.01 82.89 FRT | 23 0.23 83.12 GCK | 89 0.89 84.01 GEO | 1 0.01 84.02 GM4 | 191 1.91 85.93 H75 | 1 0.01 85.94 HFF | 1 0.01 85.95 HOM | 2 0.02 85.97 HTL | 2 0.02 85.99 HTP | 104 1.04 87.03 J/E | 2 0.02 87.05 JEE | 6 0.06 87.11 JMY | 11 0.11 87.22 K10 | 12 0.12 87.34 K15 | 15 0.15 87.49 K20 | 3 0.03 87.52 K25 | 1 0.01 87.53 K30 | 1 0.01 87.54 KOD | 2 0.02 87.56 KOM | 1 0.01 87.57 L/M | 1 0.01 87.58 LIB | 6 0.06 87.64 LLN | 1 0.01 87.65 LUV | 2 0.02 87.67 MAX | 5 0.05 87.72 MCV | 18 0.18 87.90 MHV | 10 0.10 88.00 MMX | 5 0.05 88.05 MRM | 2 0.02 88.07 MXV | 1 0.01 88.08 NPR | 5 0.05 88.13 P30 | 13 0.13 88.26 P62 | 1 0.01 88.27 PAR | 1 0.01 88.28 PUP | 4 0.04 88.32 R/V | 6 0.06 88.38 R10 | 3 0.03 88.41 R15 | 2 0.02 88.43 R30 | 2 0.02 88.45 R35 | 1 0.01 88.46 R50 | 2 0.02 88.48 RAM | 1 0.01 88.49 RMV | 39 0.39 88.88 RMW | 1 0.01 88.89 RNG | 183 1.83 90.72 RPC | 134 1.34 92.06 RRV | 1 0.01 92.07 RUN | 1 0.01 92.08 S | 121 1.21 93.29 S/V | 15 0.15 93.44 S15 | 4 0.04 93.48 SAF | 20 0.20 93.68 SAV | 4 0.04 93.72 SBS | 1 0.01 93.73 SCT | 2 0.02 93.75 SIE | 94 0.94 94.69 SIL | 117 1.17 95.86 SON | 21 0.21 96.07 SPK | 1 0.01 96.08 SPO | 1 0.01 96.09 SPT | 2 0.02 96.11 SRW | 43 0.43 96.54 SS | 10 0.10 96.64 STE | 6 0.06 96.70 STV | 1 0.01 96.71 T10 | 6 0.06 96.77 TAC | 66 0.66 97.43 THG | 1 0.01 97.44 TOP | 3 0.03 97.47 TRK | 37 0.37 97.84 TUN | 27 0.27 98.11 UDS | 2 0.02 98.13 UHT | 4 0.04 98.17 UNI | 1 0.01 98.18 V10 | 1 0.01 98.19 V15 | 6 0.06 98.25 V20 | 1 0.01 98.26 V30 | 1 0.01 98.27 VAN | 51 0.51 98.78 VHD | 1 0.01 98.79 VVN | 12 0.12 98.91 VWG | 3 0.03 98.94 VYG | 1 0.01 98.95 W/T | 11 0.11 99.06 W/Y | 18 0.18 99.24 W10 | 3 0.03 99.27 W15 | 2 0.02 99.29 W20 | 5 0.05 99.34 W30 | 1 0.01 99.35 W51 | 1 0.01 99.36 WAG | 3 0.03 99.39 WCN | 6 0.06 99.45 WHC | 1 0.01 99.46 WIN | 1 0.01 99.47 WMX | 1 0.01 99.48 WRA | 1 0.01 99.49 X44 | 10 0.10 99.59 XCB | 6 0.06 99.65 XPD | 6 0.06 99.71 Y/D | 1 0.01 99.72 YUK | 28 0.28 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016