Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 2 0.02 0.02 *** | 6,513 65.13 65.15 200 | 1 0.01 65.16 20S | 1 0.01 65.17 250 | 1 0.01 65.18 30S | 5 0.05 65.23 4/5 | 2 0.02 65.25 40S | 35 0.35 65.60 44P | 10 0.10 65.70 450 | 1 0.01 65.71 560 | 1 0.01 65.72 600 | 32 0.32 66.04 700 | 5 0.05 66.09 70S | 3 0.03 66.12 720 | 3 0.03 66.15 80S | 6 0.06 66.21 90S | 10 0.10 66.31 910 | 3 0.03 66.34 920 | 17 0.17 66.51 940 | 13 0.13 66.64 990 | 5 0.05 66.69 999 | 512 5.12 71.81 ARO | 17 0.17 71.98 AST | 24 0.24 72.22 AVL | 7 0.07 72.29 B20 | 4 0.04 72.33 B22 | 3 0.03 72.36 B23 | 2 0.02 72.38 B25 | 2 0.02 72.40 B26 | 1 0.01 72.41 B30 | 5 0.05 72.46 B40 | 2 0.02 72.48 BRO | 3 0.03 72.51 BSR | 1 0.01 72.52 C10 | 12 0.12 72.64 C15 | 8 0.08 72.72 C25 | 2 0.02 72.74 C30 | 3 0.03 72.77 C35 | 3 0.03 72.80 C45 | 3 0.03 72.83 C55 | 5 0.05 72.88 C60 | 1 0.01 72.89 C65 | 2 0.02 72.91 C75 | 3 0.03 72.94 CAL | 21 0.21 73.15 CAN | 9 0.09 73.24 CAR | 1 0.01 73.25 CCH | 1 0.01 73.26 CF | 1 0.01 73.27 CHA | 6 0.06 73.33 CHK | 40 0.40 73.73 CMD | 4 0.04 73.77 CNV | 7 0.07 73.84 COE | 14 0.14 73.98 COF | 292 2.92 76.90 COH | 2 0.02 76.92 COL | 8 0.08 77.00 COM | 2 0.02 77.02 CON | 376 3.76 80.78 CSC | 3 0.03 80.81 CSR | 4 0.04 80.85 CTV | 15 0.15 81.00 CWS | 1 0.01 81.01 D15 | 2 0.02 81.03 D21 | 2 0.02 81.05 D30 | 2 0.02 81.07 D5I | 1 0.01 81.08 DAK | 47 0.47 81.55 DEN | 4 0.04 81.59 DIS | 8 0.08 81.67 DRW | 33 0.33 82.00 ECO | 9 0.09 82.09 ELC | 2 0.02 82.11 ENV | 22 0.22 82.33 ESC | 2 0.02 82.35 ETV | 3 0.03 82.38 EXP | 20 0.20 82.58 FE8 | 2 0.02 82.60 FM2 | 16 0.16 82.76 FRR | 1 0.01 82.77 FRT | 46 0.46 83.23 FTR | 1 0.01 83.24 GCK | 94 0.94 84.18 GM4 | 105 1.05 85.23 HFE | 1 0.01 85.24 HIN | 5 0.05 85.29 HTL | 1 0.01 85.30 HTP | 39 0.39 85.69 HUM | 10 0.10 85.79 J/E | 1 0.01 85.80 JEE | 2 0.02 85.82 JMY | 14 0.14 85.96 K10 | 3 0.03 85.99 K15 | 7 0.07 86.06 K25 | 2 0.02 86.08 LCF | 2 0.02 86.10 LIB | 27 0.27 86.37 LR3 | 1 0.01 86.38 MCV | 9 0.09 86.47 MHV | 3 0.03 86.50 MMX | 1 0.01 86.51 MNT | 2 0.02 86.53 MON | 5 0.05 86.58 MSP | 1 0.01 86.59 MTH | 1 0.01 86.60 NPR | 6 0.06 86.66 NQR | 3 0.03 86.69 P30 | 4 0.04 86.73 PRO | 3 0.03 86.76 PRT | 1 0.01 86.77 PUP | 1 0.01 86.78 R/V | 3 0.03 86.81 R10 | 3 0.03 86.84 R15 | 1 0.01 86.85 R50 | 3 0.03 86.88 RAI | 1 0.01 86.89 RAM | 2 0.02 86.91 RID | 5 0.05 86.96 RMV | 7 0.07 87.03 RMW | 2 0.02 87.05 RNG | 114 1.14 88.19 RPC | 181 1.81 90.00 RRV | 5 0.05 90.05 RSP | 1 0.01 90.06 S | 71 0.71 90.77 S/V | 10 0.10 90.87 S10 | 8 0.08 90.95 S15 | 5 0.05 91.00 SAF | 10 0.10 91.10 SAV | 6 0.06 91.16 SIE | 102 1.02 92.18 SIL | 238 2.38 94.56 SNR | 2 0.02 94.58 SON | 17 0.17 94.75 SPR | 1 0.01 94.76 SRW | 90 0.90 95.66 SS | 3 0.03 95.69 STE | 13 0.13 95.82 STV | 3 0.03 95.85 T10 | 5 0.05 95.90 T7F | 1 0.01 95.91 TAC | 90 0.90 96.81 TOP | 2 0.02 96.83 TRA | 1 0.01 96.84 TRK | 17 0.17 97.01 TSP | 3 0.03 97.04 TSR | 1 0.01 97.05 TTN | 19 0.19 97.24 TUN | 38 0.38 97.62 UDS | 2 0.02 97.64 UHT | 10 0.10 97.74 UPL | 6 0.06 97.80 V15 | 2 0.02 97.82 VAN | 48 0.48 98.30 VHD | 1 0.01 98.31 VTR | 11 0.11 98.42 VVN | 32 0.32 98.74 W/T | 25 0.25 98.99 W/Y | 10 0.10 99.09 W10 | 1 0.01 99.10 W20 | 1 0.01 99.11 W30 | 1 0.01 99.12 WAG | 2 0.02 99.14 WCN | 2 0.02 99.16 WHC | 1 0.01 99.17 WIN | 24 0.24 99.41 WRA | 7 0.07 99.48 WUL | 2 0.02 99.50 XCB | 1 0.01 99.51 XPD | 4 0.04 99.55 Y/D | 1 0.01 99.56 YUK | 44 0.44 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016