Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 3 0.03 0.03 *** | 6,551 65.51 65.54 10S | 2 0.02 65.56 3/5 | 1 0.01 65.57 30S | 5 0.05 65.62 400 | 2 0.02 65.64 40S | 21 0.21 65.85 44P | 3 0.03 65.88 550 | 1 0.01 65.89 600 | 35 0.35 66.24 700 | 3 0.03 66.27 70S | 2 0.02 66.29 720 | 4 0.04 66.33 80S | 10 0.10 66.43 90S | 6 0.06 66.49 910 | 2 0.02 66.51 920 | 13 0.13 66.64 930 | 1 0.01 66.65 940 | 10 0.10 66.75 990 | 1 0.01 66.76 999 | 478 4.78 71.54 ACA | 3 0.03 71.57 ACL | 1 0.01 71.58 ARO | 12 0.12 71.70 AST | 29 0.29 71.99 AVL | 9 0.09 72.08 B20 | 2 0.02 72.10 B22 | 2 0.02 72.12 B23 | 5 0.05 72.17 B26 | 3 0.03 72.20 B30 | 6 0.06 72.26 B40 | 1 0.01 72.27 C10 | 18 0.18 72.45 C15 | 4 0.04 72.49 C20 | 2 0.02 72.51 C30 | 2 0.02 72.53 C45 | 1 0.01 72.54 C55 | 3 0.03 72.57 C6V | 2 0.02 72.59 C75 | 1 0.01 72.60 C96 | 1 0.01 72.61 CAL | 11 0.11 72.72 CAN | 1 0.01 72.73 CHA | 7 0.07 72.80 CHK | 46 0.46 73.26 CMD | 4 0.04 73.30 CMP | 2 0.02 73.32 CNV | 7 0.07 73.39 COE | 7 0.07 73.46 COF | 306 3.06 76.52 COL | 5 0.05 76.57 COM | 1 0.01 76.58 CON | 300 3.00 79.58 CSC | 3 0.03 79.61 CSR | 5 0.05 79.66 CTA | 1 0.01 79.67 CTV | 15 0.15 79.82 CVS | 4 0.04 79.86 CWN | 1 0.01 79.87 CWS | 2 0.02 79.89 D10 | 1 0.01 79.90 D15 | 1 0.01 79.91 D20 | 2 0.02 79.93 D21 | 11 0.11 80.04 D51 | 1 0.01 80.05 DAK | 52 0.52 80.57 DEN | 2 0.02 80.59 DIS | 7 0.07 80.66 DRW | 42 0.42 81.08 E/D | 1 0.01 81.09 ECO | 16 0.16 81.25 ELC | 1 0.01 81.26 ENV | 13 0.13 81.39 ETV | 2 0.02 81.41 EXP | 15 0.15 81.56 FCC | 2 0.02 81.58 FE8 | 2 0.02 81.60 FM2 | 14 0.14 81.74 FM6 | 2 0.02 81.76 FRE | 1 0.01 81.77 FRT | 41 0.41 82.18 FTR | 1 0.01 82.19 GCK | 102 1.02 83.21 GM4 | 127 1.27 84.48 HIN | 1 0.01 84.49 HOM | 1 0.01 84.50 HTP | 27 0.27 84.77 HUM | 7 0.07 84.84 INT | 1 0.01 84.85 JEE | 3 0.03 84.88 JMY | 14 0.14 85.02 K10 | 3 0.03 85.05 K15 | 4 0.04 85.09 K20 | 1 0.01 85.10 K25 | 1 0.01 85.11 KOD | 1 0.01 85.12 LIB | 22 0.22 85.34 LR3 | 1 0.01 85.35 LUV | 1 0.01 85.36 M/T | 2 0.02 85.38 MAX | 1 0.01 85.39 MCV | 8 0.08 85.47 MHC | 1 0.01 85.48 MHV | 3 0.03 85.51 MMX | 3 0.03 85.54 MON | 4 0.04 85.58 NPR | 6 0.06 85.64 NQR | 1 0.01 85.65 NRR | 2 0.02 85.67 P30 | 4 0.04 85.71 P42 | 1 0.01 85.72 PCC | 1 0.01 85.73 PRO | 7 0.07 85.80 PUP | 2 0.02 85.82 R/V | 1 0.01 85.83 R15 | 1 0.01 85.84 R30 | 1 0.01 85.85 R35 | 1 0.01 85.86 R50 | 2 0.02 85.88 RAI | 1 0.01 85.89 RID | 2 0.02 85.91 RMV | 9 0.09 86.00 RMW | 1 0.01 86.01 RNG | 112 1.12 87.13 RPC | 214 2.14 89.27 RRV | 7 0.07 89.34 RSP | 1 0.01 89.35 RUN | 1 0.01 89.36 S | 93 0.93 90.29 S/V | 7 0.07 90.36 S10 | 5 0.05 90.41 S15 | 7 0.07 90.48 S6M | 1 0.01 90.49 SAF | 9 0.09 90.58 SAV | 6 0.06 90.64 SCT | 1 0.01 90.65 SIE | 101 1.01 91.66 SIL | 235 2.35 94.01 SNR | 1 0.01 94.02 SON | 15 0.15 94.17 SPR | 1 0.01 94.18 SRW | 95 0.95 95.13 SS | 2 0.02 95.15 SSE | 1 0.01 95.16 STE | 11 0.11 95.27 STV | 3 0.03 95.30 T10 | 4 0.04 95.34 TAC | 105 1.05 96.39 TOP | 3 0.03 96.42 TRA | 1 0.01 96.43 TRK | 20 0.20 96.63 TSP | 1 0.01 96.64 TSR | 1 0.01 96.65 TTN | 22 0.22 96.87 TUN | 63 0.63 97.50 UDS | 5 0.05 97.55 UHT | 4 0.04 97.59 UPL | 3 0.03 97.62 V10 | 2 0.02 97.64 V15 | 3 0.03 97.67 VAN | 50 0.50 98.17 VHD | 1 0.01 98.18 VMX | 1 0.01 98.19 VTR | 10 0.10 98.29 VVN | 42 0.42 98.71 VWG | 2 0.02 98.73 W/T | 24 0.24 98.97 W/Y | 12 0.12 99.09 W15 | 1 0.01 99.10 W20 | 2 0.02 99.12 W30 | 2 0.02 99.14 WAG | 2 0.02 99.16 WCN | 2 0.02 99.18 WHC | 1 0.01 99.19 WIN | 32 0.32 99.51 WRA | 4 0.04 99.55 WUL | 1 0.01 99.56 XCB | 1 0.01 99.57 XPD | 4 0.04 99.61 YUK | 39 0.39 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016