Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 28 0.28 0.28 *** | 6,218 62.18 62.46 20S | 3 0.03 62.49 3/5 | 1 0.01 62.50 30S | 5 0.05 62.55 4/5 | 1 0.01 62.56 400 | 3 0.03 62.59 40S | 17 0.17 62.76 44P | 19 0.19 62.95 450 | 1 0.01 62.96 500 | 1 0.01 62.97 600 | 43 0.43 63.40 720 | 8 0.08 63.48 80S | 20 0.20 63.68 830 | 1 0.01 63.69 90S | 26 0.26 63.95 910 | 7 0.07 64.02 920 | 19 0.19 64.21 930 | 1 0.01 64.22 937 | 1 0.01 64.23 940 | 3 0.03 64.26 990 | 5 0.05 64.31 999 | 579 5.79 70.10 ACL | 1 0.01 70.11 ARO | 16 0.16 70.27 AST | 22 0.22 70.49 B20 | 6 0.06 70.55 B22 | 11 0.11 70.66 B23 | 6 0.06 70.72 B25 | 5 0.05 70.77 B26 | 4 0.04 70.81 B30 | 6 0.06 70.87 B40 | 3 0.03 70.90 BRO | 5 0.05 70.95 BUS | 2 0.02 70.97 BVN | 3 0.03 71.00 BZR | 1 0.01 71.01 C10 | 51 0.51 71.52 C15 | 13 0.13 71.65 C20 | 14 0.14 71.79 C25 | 5 0.05 71.84 C30 | 3 0.03 71.87 C35 | 2 0.02 71.89 C40 | 1 0.01 71.90 C60 | 2 0.02 71.92 C6V | 3 0.03 71.95 C96 | 3 0.03 71.98 C97 | 2 0.02 72.00 CAB | 1 0.01 72.01 CCH | 3 0.03 72.04 CHA | 3 0.03 72.07 CHK | 56 0.56 72.63 CLT | 3 0.03 72.66 CLU | 3 0.03 72.69 CNV | 5 0.05 72.74 COE | 45 0.45 73.19 COF | 328 3.28 76.47 COH | 3 0.03 76.50 COL | 7 0.07 76.57 COM | 2 0.02 76.59 CON | 347 3.47 80.06 CSC | 1 0.01 80.07 CSR | 10 0.10 80.17 CTV | 16 0.16 80.33 CVS | 11 0.11 80.44 CWS | 5 0.05 80.49 D10 | 5 0.05 80.54 D15 | 10 0.10 80.64 D20 | 4 0.04 80.68 D21 | 19 0.19 80.87 D30 | 2 0.02 80.89 D51 | 1 0.01 80.90 D5I | 1 0.01 80.91 D60 | 1 0.01 80.92 DAK | 59 0.59 81.51 DEN | 2 0.02 81.53 DIS | 7 0.07 81.60 DRW | 13 0.13 81.73 ECO | 5 0.05 81.78 EPR | 3 0.03 81.81 EXP | 1 0.01 81.82 F95 | 1 0.01 81.83 FCC | 2 0.02 81.85 FE6 | 1 0.01 81.86 FH2 | 1 0.01 81.87 FM6 | 1 0.01 81.88 FMC | 1 0.01 81.89 FRR | 2 0.02 81.91 FRT | 28 0.28 82.19 FTR | 2 0.02 82.21 GCK | 61 0.61 82.82 GEO | 1 0.01 82.83 GM4 | 239 2.39 85.22 H95 | 1 0.01 85.23 HFE | 1 0.01 85.24 HOM | 3 0.03 85.27 HTC | 1 0.01 85.28 HTL | 4 0.04 85.32 HTP | 92 0.92 86.24 INT | 2 0.02 86.26 JEE | 8 0.08 86.34 JMY | 14 0.14 86.48 K10 | 32 0.32 86.80 K15 | 14 0.14 86.94 K20 | 5 0.05 86.99 K25 | 4 0.04 87.03 KOD | 1 0.01 87.04 LCH | 3 0.03 87.07 LDS | 1 0.01 87.08 LIB | 1 0.01 87.09 LLN | 1 0.01 87.10 LUV | 1 0.01 87.11 M95 | 1 0.01 87.12 MAX | 1 0.01 87.13 MCV | 17 0.17 87.30 MHC | 1 0.01 87.31 MHV | 12 0.12 87.43 MMX | 9 0.09 87.52 MRM | 1 0.01 87.53 NPR | 12 0.12 87.65 NRR | 1 0.01 87.66 P30 | 6 0.06 87.72 P42 | 2 0.02 87.74 PUP | 5 0.05 87.79 R15 | 1 0.01 87.80 R20 | 2 0.02 87.82 R30 | 2 0.02 87.84 R35 | 1 0.01 87.85 R50 | 6 0.06 87.91 RAM | 1 0.01 87.92 RB | 1 0.01 87.93 RBT | 1 0.01 87.94 RMV | 22 0.22 88.16 RMW | 1 0.01 88.17 RNG | 206 2.06 90.23 RPC | 119 1.19 91.42 RRV | 3 0.03 91.45 S | 148 1.48 92.93 S/V | 24 0.24 93.17 S15 | 14 0.14 93.31 S6M | 2 0.02 93.33 SAF | 16 0.16 93.49 SAV | 4 0.04 93.53 SBS | 2 0.02 93.55 SCT | 2 0.02 93.57 SIE | 92 0.92 94.49 SIL | 74 0.74 95.23 SON | 25 0.25 95.48 SPT | 2 0.02 95.50 SRW | 49 0.49 95.99 SS | 7 0.07 96.06 STE | 5 0.05 96.11 STV | 3 0.03 96.14 T10 | 12 0.12 96.26 TAC | 70 0.70 96.96 TNS | 2 0.02 96.98 TOP | 2 0.02 97.00 TRK | 72 0.72 97.72 TSR | 1 0.01 97.73 TUN | 18 0.18 97.91 UDS | 8 0.08 97.99 UHT | 4 0.04 98.03 V10 | 1 0.01 98.04 V15 | 2 0.02 98.06 V20 | 1 0.01 98.07 V25 | 1 0.01 98.08 VAN | 69 0.69 98.77 VVN | 24 0.24 99.01 VWG | 4 0.04 99.05 VYG | 1 0.01 99.06 W/T | 18 0.18 99.24 W/Y | 15 0.15 99.39 W10 | 3 0.03 99.42 W15 | 1 0.01 99.43 W20 | 8 0.08 99.51 W30 | 1 0.01 99.52 WAG | 4 0.04 99.56 WCN | 5 0.05 99.61 WHC | 1 0.01 99.62 WMX | 1 0.01 99.63 WRA | 1 0.01 99.64 X44 | 5 0.05 99.69 XCB | 8 0.08 99.77 XPD | 6 0.06 99.83 YUK | 17 0.17 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016