Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN Truck | series | Freq. Percent Cum. ------------+----------------------------------- | 7,011 70.11 70.11 400 | 1 0.01 70.12 40S | 24 0.24 70.36 44P | 6 0.06 70.42 450 | 1 0.01 70.43 600 | 28 0.28 70.71 700 | 9 0.09 70.80 70S | 3 0.03 70.83 720 | 5 0.05 70.88 800 | 1 0.01 70.89 80S | 6 0.06 70.95 90S | 3 0.03 70.98 920 | 17 0.17 71.15 940 | 11 0.11 71.26 990 | 6 0.06 71.32 ACA | 2 0.02 71.34 ARO | 5 0.05 71.39 AST | 32 0.32 71.71 AVL | 16 0.16 71.87 B20 | 1 0.01 71.88 B22 | 3 0.03 71.91 B23 | 4 0.04 71.95 B25 | 3 0.03 71.98 B30 | 2 0.02 72.00 B40 | 2 0.02 72.02 BRO | 1 0.01 72.03 C/C | 1 0.01 72.04 C10 | 6 0.06 72.10 C15 | 5 0.05 72.15 C20 | 4 0.04 72.19 C25 | 1 0.01 72.20 C35 | 1 0.01 72.21 C45 | 1 0.01 72.22 C55 | 2 0.02 72.24 C60 | 1 0.01 72.25 C6V | 2 0.02 72.27 C85 | 1 0.01 72.28 CAL | 19 0.19 72.47 CAR | 47 0.47 72.94 CCH | 1 0.01 72.95 CF | 2 0.02 72.97 CHA | 8 0.08 73.05 CHK | 36 0.36 73.41 CMD | 1 0.01 73.42 CMP | 5 0.05 73.47 CNV | 7 0.07 73.54 COE | 6 0.06 73.60 COF | 301 3.01 76.61 COH | 1 0.01 76.62 COL | 7 0.07 76.69 CON | 324 3.24 79.93 CSC | 18 0.18 80.11 CSR | 5 0.05 80.16 CTV | 21 0.21 80.37 CVS | 2 0.02 80.39 CWS | 2 0.02 80.41 D15 | 1 0.01 80.42 D20 | 1 0.01 80.43 D21 | 7 0.07 80.50 DAK | 57 0.57 81.07 DEN | 1 0.01 81.08 DIS | 4 0.04 81.12 DRW | 38 0.38 81.50 E/D | 3 0.03 81.53 E/X | 3 0.03 81.56 ECO | 14 0.14 81.70 ELC | 1 0.01 81.71 ENV | 25 0.25 81.96 ESC | 4 0.04 82.00 ETV | 5 0.05 82.05 EXP | 24 0.24 82.29 FM2 | 11 0.11 82.40 FM6 | 2 0.02 82.42 FRE | 2 0.02 82.44 FRR | 1 0.01 82.45 FRT | 36 0.36 82.81 FTR | 1 0.01 82.82 GCK | 93 0.93 83.75 GM4 | 109 1.09 84.84 HIN | 4 0.04 84.88 HLX | 1 0.01 84.89 HTL | 1 0.01 84.90 HTP | 19 0.19 85.09 HUM | 5 0.05 85.14 I29 | 1 0.01 85.15 J/E | 1 0.01 85.16 JET | 1 0.01 85.17 JMY | 11 0.11 85.28 K10 | 3 0.03 85.31 K15 | 2 0.02 85.33 K20 | 2 0.02 85.35 K25 | 1 0.01 85.36 K30 | 2 0.02 85.38 KOD | 1 0.01 85.39 LDS | 1 0.01 85.40 LIB | 18 0.18 85.58 LR3 | 1 0.01 85.59 M/T | 1 0.01 85.60 MAX | 3 0.03 85.63 MCV | 7 0.07 85.70 MHV | 4 0.04 85.74 MNS | 1 0.01 85.75 MON | 5 0.05 85.80 NPR | 12 0.12 85.92 P30 | 2 0.02 85.94 PRO | 14 0.14 86.08 PRT | 3 0.03 86.11 R/V | 2 0.02 86.13 R20 | 1 0.01 86.14 RAI | 3 0.03 86.17 RID | 4 0.04 86.21 RMV | 11 0.11 86.32 RNG | 116 1.16 87.48 RPC | 193 1.93 89.41 RRV | 5 0.05 89.46 RSP | 4 0.04 89.50 S | 61 0.61 90.11 S/V | 4 0.04 90.15 S15 | 3 0.03 90.18 SAF | 8 0.08 90.26 SAV | 6 0.06 90.32 SCT | 1 0.01 90.33 SIE | 121 1.21 91.54 SIL | 215 2.15 93.69 SNR | 2 0.02 93.71 SON | 15 0.15 93.86 SPR | 1 0.01 93.87 SRW | 106 1.06 94.93 SS | 3 0.03 94.96 SSE | 1 0.01 94.97 STE | 18 0.18 95.15 STV | 3 0.03 95.18 T10 | 6 0.06 95.24 T7F | 1 0.01 95.25 TAC | 101 1.01 96.26 TER | 1 0.01 96.27 TOP | 2 0.02 96.29 TRK | 24 0.24 96.53 TRN | 1 0.01 96.54 TSP | 1 0.01 96.55 TTN | 21 0.21 96.76 TUN | 61 0.61 97.37 TWC | 19 0.19 97.56 UDS | 2 0.02 97.58 UHT | 6 0.06 97.64 UPL | 5 0.05 97.69 VAN | 40 0.40 98.09 VOF | 1 0.01 98.10 VOV | 1 0.01 98.11 VTR | 10 0.10 98.21 VVN | 45 0.45 98.66 W/T | 29 0.29 98.95 W/Y | 9 0.09 99.04 W10 | 1 0.01 99.05 W20 | 4 0.04 99.09 WCN | 1 0.01 99.10 WIN | 21 0.21 99.31 WRA | 7 0.07 99.38 WUL | 4 0.04 99.42 X44 | 1 0.01 99.43 XCB | 3 0.03 99.46 XPD | 4 0.04 99.50 YUK | 50 0.50 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016