Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 11 0.11 0.11 *** | 6,316 63.16 63.27 10S | 1 0.01 63.28 200 | 2 0.02 63.30 20S | 1 0.01 63.31 30S | 1 0.01 63.32 4/5 | 4 0.04 63.36 400 | 2 0.02 63.38 40S | 23 0.23 63.61 44P | 5 0.05 63.66 600 | 24 0.24 63.90 620 | 1 0.01 63.91 700 | 4 0.04 63.95 720 | 6 0.06 64.01 80S | 16 0.16 64.17 830 | 1 0.01 64.18 90S | 13 0.13 64.31 910 | 3 0.03 64.34 920 | 14 0.14 64.48 937 | 1 0.01 64.49 940 | 7 0.07 64.56 990 | 2 0.02 64.58 999 | 618 6.18 70.76 ARO | 12 0.12 70.88 AST | 12 0.12 71.00 AVL | 7 0.07 71.07 B20 | 4 0.04 71.11 B22 | 4 0.04 71.15 B23 | 3 0.03 71.18 B26 | 2 0.02 71.20 B30 | 2 0.02 71.22 B40 | 1 0.01 71.23 BRO | 3 0.03 71.26 C10 | 27 0.27 71.53 C15 | 11 0.11 71.64 C20 | 10 0.10 71.74 C25 | 7 0.07 71.81 C30 | 3 0.03 71.84 C55 | 3 0.03 71.87 C5M | 1 0.01 71.88 C65 | 1 0.01 71.89 C6M | 2 0.02 71.91 C6V | 1 0.01 71.92 C75 | 1 0.01 71.93 C80 | 1 0.01 71.94 C96 | 3 0.03 71.97 CAL | 12 0.12 72.09 CAN | 2 0.02 72.11 CAR | 2 0.02 72.13 CCH | 4 0.04 72.17 CHA | 1 0.01 72.18 CHK | 52 0.52 72.70 CLT | 1 0.01 72.71 CLU | 1 0.01 72.72 CNV | 7 0.07 72.79 COE | 20 0.20 72.99 COF | 304 3.04 76.03 COH | 2 0.02 76.05 COL | 4 0.04 76.09 COM | 1 0.01 76.10 CON | 377 3.77 79.87 CSC | 2 0.02 79.89 CSR | 3 0.03 79.92 CTS | 1 0.01 79.93 CTV | 17 0.17 80.10 CVS | 5 0.05 80.15 D10 | 3 0.03 80.18 D15 | 3 0.03 80.21 D20 | 4 0.04 80.25 D21 | 11 0.11 80.36 D30 | 1 0.01 80.37 DAK | 55 0.55 80.92 DEN | 5 0.05 80.97 DIS | 4 0.04 81.01 DRW | 36 0.36 81.37 E/X | 1 0.01 81.38 ECO | 9 0.09 81.47 ENV | 11 0.11 81.58 EPR | 1 0.01 81.59 ESC | 2 0.02 81.61 ETV | 3 0.03 81.64 EXP | 14 0.14 81.78 FCC | 3 0.03 81.81 FE6 | 1 0.01 81.82 FM2 | 2 0.02 81.84 FRR | 1 0.01 81.85 FRT | 33 0.33 82.18 FTR | 1 0.01 82.19 G15 | 1 0.01 82.20 GCK | 94 0.94 83.14 GM4 | 179 1.79 84.93 HFB | 1 0.01 84.94 HIN | 1 0.01 84.95 HOM | 2 0.02 84.97 HTL | 1 0.01 84.98 HTP | 53 0.53 85.51 HUM | 3 0.03 85.54 HVR | 1 0.01 85.55 JEE | 7 0.07 85.62 JMY | 10 0.10 85.72 K10 | 14 0.14 85.86 K15 | 10 0.10 85.96 K20 | 4 0.04 86.00 K25 | 2 0.02 86.02 LB1 | 2 0.02 86.04 LCH | 1 0.01 86.05 LDS | 1 0.01 86.06 LIB | 17 0.17 86.23 LR3 | 1 0.01 86.24 LTC | 1 0.01 86.25 LUV | 1 0.01 86.26 M95 | 1 0.01 86.27 MAX | 1 0.01 86.28 MCV | 8 0.08 86.36 MHV | 7 0.07 86.43 MK9 | 1 0.01 86.44 MMX | 5 0.05 86.49 MXV | 1 0.01 86.50 NPR | 11 0.11 86.61 NQR | 3 0.03 86.64 NRR | 1 0.01 86.65 P30 | 5 0.05 86.70 R/V | 4 0.04 86.74 R10 | 2 0.02 86.76 R25 | 1 0.01 86.77 R30 | 3 0.03 86.80 R50 | 1 0.01 86.81 RAL | 1 0.01 86.82 RMV | 16 0.16 86.98 RNG | 150 1.50 88.48 RPC | 177 1.77 90.25 RRV | 3 0.03 90.28 S | 91 0.91 91.19 S/V | 15 0.15 91.34 S10 | 3 0.03 91.37 S15 | 7 0.07 91.44 SAF | 20 0.20 91.64 SAV | 3 0.03 91.67 SIE | 111 1.11 92.78 SIL | 220 2.20 94.98 SON | 22 0.22 95.20 SPX | 1 0.01 95.21 SRW | 103 1.03 96.24 SS | 5 0.05 96.29 STE | 8 0.08 96.37 STV | 6 0.06 96.43 T10 | 8 0.08 96.51 TAC | 80 0.80 97.31 TOP | 2 0.02 97.33 TRK | 35 0.35 97.68 TSR | 1 0.01 97.69 TTN | 12 0.12 97.81 TUN | 31 0.31 98.12 UDS | 2 0.02 98.14 UHT | 1 0.01 98.15 V25 | 1 0.01 98.16 VAN | 52 0.52 98.68 VFE | 1 0.01 98.69 VHD | 1 0.01 98.70 VTR | 1 0.01 98.71 VVN | 30 0.30 99.01 W/T | 21 0.21 99.22 W/Y | 12 0.12 99.34 W10 | 1 0.01 99.35 W15 | 3 0.03 99.38 W20 | 2 0.02 99.40 W30 | 1 0.01 99.41 WCN | 7 0.07 99.48 WIN | 1 0.01 99.49 WLC | 1 0.01 99.50 WRA | 3 0.03 99.53 X44 | 2 0.02 99.55 XCB | 1 0.01 99.56 XPD | 5 0.05 99.61 YUK | 39 0.39 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016