Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 20 0.20 0.20 *** | 6,344 63.44 63.64 10S | 1 0.01 63.65 200 | 1 0.01 63.66 20S | 3 0.03 63.69 3/5 | 1 0.01 63.70 30S | 5 0.05 63.75 4/5 | 2 0.02 63.77 40S | 30 0.30 64.07 44P | 8 0.08 64.15 600 | 32 0.32 64.47 700 | 3 0.03 64.50 720 | 6 0.06 64.56 80S | 5 0.05 64.61 90S | 12 0.12 64.73 910 | 6 0.06 64.79 920 | 17 0.17 64.96 930 | 3 0.03 64.99 937 | 1 0.01 65.00 940 | 2 0.02 65.02 990 | 5 0.05 65.07 999 | 569 5.69 70.76 ARO | 19 0.19 70.95 AST | 12 0.12 71.07 AVL | 9 0.09 71.16 B20 | 2 0.02 71.18 B22 | 5 0.05 71.23 B23 | 7 0.07 71.30 B25 | 2 0.02 71.32 B26 | 3 0.03 71.35 B30 | 5 0.05 71.40 BSR | 1 0.01 71.41 BUS | 1 0.01 71.42 C10 | 23 0.23 71.65 C15 | 15 0.15 71.80 C20 | 7 0.07 71.87 C25 | 2 0.02 71.89 C30 | 4 0.04 71.93 C35 | 3 0.03 71.96 C45 | 1 0.01 71.97 C50 | 3 0.03 72.00 C65 | 2 0.02 72.02 C6V | 3 0.03 72.05 C96 | 2 0.02 72.07 CAL | 2 0.02 72.09 CAN | 1 0.01 72.10 CCH | 3 0.03 72.13 CGS | 1 0.01 72.14 CHA | 6 0.06 72.20 CHK | 55 0.55 72.75 CLT | 2 0.02 72.77 CNV | 8 0.08 72.85 COE | 29 0.29 73.14 COF | 347 3.47 76.61 COH | 3 0.03 76.64 COL | 3 0.03 76.67 COM | 3 0.03 76.70 CON | 373 3.73 80.43 CRV | 2 0.02 80.45 CSC | 1 0.01 80.46 CSR | 10 0.10 80.56 CTS | 1 0.01 80.57 CTV | 17 0.17 80.74 CVS | 6 0.06 80.80 CWS | 2 0.02 80.82 D10 | 1 0.01 80.83 D15 | 2 0.02 80.85 D20 | 2 0.02 80.87 D21 | 15 0.15 81.02 D30 | 1 0.01 81.03 D51 | 2 0.02 81.05 D5I | 2 0.02 81.07 DAK | 52 0.52 81.59 DEN | 5 0.05 81.64 DIS | 8 0.08 81.72 DRW | 28 0.28 82.00 E/X | 1 0.01 82.01 ECO | 10 0.10 82.11 ENV | 9 0.09 82.20 EPT | 1 0.01 82.21 ERN | 1 0.01 82.22 ESC | 2 0.02 82.24 ETV | 2 0.02 82.26 EXP | 5 0.05 82.31 FE6 | 4 0.04 82.35 FM2 | 1 0.01 82.36 FM6 | 1 0.01 82.37 FRE | 1 0.01 82.38 FRR | 1 0.01 82.39 FRT | 39 0.39 82.78 FTR | 4 0.04 82.82 GCK | 77 0.77 83.59 GM4 | 150 1.50 85.09 HFD | 1 0.01 85.10 HFE | 1 0.01 85.11 HTL | 1 0.01 85.12 HTP | 66 0.66 85.78 HUM | 4 0.04 85.82 J/E | 1 0.01 85.83 J95 | 1 0.01 85.84 JEE | 10 0.10 85.94 JMY | 12 0.12 86.06 K10 | 7 0.07 86.13 K15 | 15 0.15 86.28 K20 | 3 0.03 86.31 K25 | 2 0.02 86.33 LB1 | 1 0.01 86.34 LDS | 1 0.01 86.35 LIB | 10 0.10 86.45 LTC | 1 0.01 86.46 LUV | 2 0.02 86.48 MAX | 2 0.02 86.50 MCV | 15 0.15 86.65 MHC | 2 0.02 86.67 MHV | 7 0.07 86.74 MMX | 8 0.08 86.82 MOU | 1 0.01 86.83 MRM | 2 0.02 86.85 NPR | 1 0.01 86.86 P30 | 6 0.06 86.92 P62 | 1 0.01 86.93 PUP | 4 0.04 86.97 PYS | 1 0.01 86.98 R/V | 9 0.09 87.07 R10 | 3 0.03 87.10 R15 | 1 0.01 87.11 R25 | 1 0.01 87.12 R35 | 2 0.02 87.14 R50 | 3 0.03 87.17 RAL | 1 0.01 87.18 RAM | 2 0.02 87.20 RMV | 12 0.12 87.32 RMW | 1 0.01 87.33 RNG | 176 1.76 89.09 RPC | 159 1.59 90.68 RRV | 5 0.05 90.73 S | 122 1.22 91.95 S/V | 15 0.15 92.10 S10 | 1 0.01 92.11 S15 | 9 0.09 92.20 SAF | 13 0.13 92.33 SAV | 7 0.07 92.40 SEQ | 1 0.01 92.41 SIE | 112 1.12 93.53 SIL | 160 1.60 95.13 SMR | 1 0.01 95.14 SON | 18 0.18 95.32 SPR | 1 0.01 95.33 SRW | 79 0.79 96.12 SS | 13 0.13 96.25 STE | 11 0.11 96.36 STV | 2 0.02 96.38 T10 | 4 0.04 96.42 TAC | 90 0.90 97.32 TNS | 1 0.01 97.33 TOP | 4 0.04 97.37 TRA | 2 0.02 97.39 TRK | 44 0.44 97.83 TTN | 6 0.06 97.89 TUN | 24 0.24 98.13 TWC | 1 0.01 98.14 UDS | 2 0.02 98.16 UHT | 4 0.04 98.20 V15 | 4 0.04 98.24 V25 | 1 0.01 98.25 VAN | 51 0.51 98.76 VHD | 1 0.01 98.77 VLR | 1 0.01 98.78 VVN | 18 0.18 98.96 VWG | 6 0.06 99.02 W/T | 18 0.18 99.20 W/Y | 16 0.16 99.36 W15 | 3 0.03 99.39 W20 | 2 0.02 99.41 W51 | 1 0.01 99.42 WCN | 7 0.07 99.49 WHC | 2 0.02 99.51 WIN | 1 0.01 99.52 WRA | 3 0.03 99.55 X44 | 3 0.03 99.58 XCB | 3 0.03 99.61 XL7 | 1 0.01 99.62 XPD | 4 0.04 99.66 YUK | 34 0.34 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016