Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 116 1.16 1.16 *** | 6,249 62.49 63.65 150 | 2 0.02 63.67 200 | 2 0.02 63.69 30S | 1 0.01 63.70 400 | 2 0.02 63.72 40S | 13 0.13 63.85 44P | 38 0.38 64.23 500 | 2 0.02 64.25 600 | 38 0.38 64.63 620 | 11 0.11 64.74 700 | 2 0.02 64.76 70S | 2 0.02 64.78 720 | 41 0.41 65.19 80S | 8 0.08 65.27 830 | 3 0.03 65.30 90S | 29 0.29 65.59 920 | 10 0.10 65.69 930 | 9 0.09 65.78 937 | 2 0.02 65.80 999 | 513 5.13 70.93 A10 | 1 0.01 70.94 ARO | 19 0.19 71.13 AST | 17 0.17 71.30 B20 | 16 0.16 71.46 B22 | 13 0.13 71.59 B23 | 3 0.03 71.62 B26 | 4 0.04 71.66 B30 | 3 0.03 71.69 BRA | 1 0.01 71.70 BRO | 10 0.10 71.80 BSP | 2 0.02 71.82 BUS | 1 0.01 71.83 BVN | 15 0.15 71.98 BZR | 1 0.01 71.99 C/C | 1 0.01 72.00 C10 | 131 1.31 73.31 C15 | 22 0.22 73.53 C20 | 44 0.44 73.97 C25 | 14 0.14 74.11 C30 | 16 0.16 74.27 C35 | 5 0.05 74.32 C50 | 2 0.02 74.34 C60 | 3 0.03 74.37 C65 | 3 0.03 74.40 C6M | 1 0.01 74.41 C6V | 3 0.03 74.44 C96 | 20 0.20 74.64 C97 | 4 0.04 74.68 CAB | 1 0.01 74.69 CAR | 4 0.04 74.73 CCH | 7 0.07 74.80 CGS | 2 0.02 74.82 CHK | 50 0.50 75.32 CLT | 2 0.02 75.34 CLU | 3 0.03 75.37 CNV | 4 0.04 75.41 COE | 64 0.64 76.05 COF | 385 3.85 79.90 COL | 16 0.16 80.06 COM | 2 0.02 80.08 CON | 276 2.76 82.84 COU | 6 0.06 82.90 CSC | 4 0.04 82.94 CTS | 3 0.03 82.97 CTV | 22 0.22 83.19 CVS | 10 0.10 83.29 D10 | 6 0.06 83.35 D15 | 12 0.12 83.47 D20 | 13 0.13 83.60 D21 | 49 0.49 84.09 D30 | 3 0.03 84.12 D51 | 3 0.03 84.15 D5I | 9 0.09 84.24 DAK | 40 0.40 84.64 DC9 | 1 0.01 84.65 DIS | 3 0.03 84.68 DSM | 1 0.01 84.69 ELC | 3 0.03 84.72 EPR | 1 0.01 84.73 FE4 | 1 0.01 84.74 FH1 | 1 0.01 84.75 FK4 | 1 0.01 84.76 FLS | 1 0.01 84.77 FM6 | 1 0.01 84.78 FSR | 1 0.01 84.79 FTR | 3 0.03 84.82 GBR | 1 0.01 84.83 GCK | 25 0.25 85.08 GM4 | 222 2.22 87.30 HFB | 2 0.02 87.32 HFE | 1 0.01 87.33 HIC | 1 0.01 87.34 HLX | 1 0.01 87.35 HOM | 1 0.01 87.36 HSG | 2 0.02 87.38 HTC | 1 0.01 87.39 HTP | 166 1.66 89.05 INT | 2 0.02 89.07 J95 | 1 0.01 89.08 JEE | 21 0.21 89.29 JET | 1 0.01 89.30 JH9 | 1 0.01 89.31 JJ9 | 1 0.01 89.32 JMY | 4 0.04 89.36 JN9 | 1 0.01 89.37 JOH | 1 0.01 89.38 JPR | 2 0.02 89.40 K10 | 35 0.35 89.75 K15 | 12 0.12 89.87 K20 | 5 0.05 89.92 K25 | 2 0.02 89.94 K30 | 2 0.02 89.96 K35 | 1 0.01 89.97 KOM | 1 0.01 89.98 LCH | 3 0.03 90.01 LDS | 2 0.02 90.03 LLN | 2 0.02 90.05 LTC | 2 0.02 90.07 LUV | 2 0.02 90.09 MAX | 1 0.01 90.10 MCV | 1 0.01 90.11 MHC | 4 0.04 90.15 MHV | 14 0.14 90.29 MK2 | 1 0.01 90.30 MMX | 12 0.12 90.42 MRM | 2 0.02 90.44 MSP | 1 0.01 90.45 MVN | 1 0.01 90.46 MXW | 1 0.01 90.47 NPR | 4 0.04 90.51 P30 | 9 0.09 90.60 P42 | 1 0.01 90.61 P52 | 1 0.01 90.62 P62 | 2 0.02 90.64 P65 | 1 0.01 90.65 PCC | 3 0.03 90.68 PUP | 6 0.06 90.74 R/V | 9 0.09 90.83 R10 | 5 0.05 90.88 R15 | 3 0.03 90.91 R20 | 2 0.02 90.93 R30 | 4 0.04 90.97 R35 | 4 0.04 91.01 R50 | 7 0.07 91.08 RAI | 1 0.01 91.09 RAL | 1 0.01 91.10 RAM | 3 0.03 91.13 RBT | 1 0.01 91.14 RMV | 24 0.24 91.38 RMW | 1 0.01 91.39 RNG | 175 1.75 93.14 ROY | 1 0.01 93.15 RPC | 44 0.44 93.59 RPU | 1 0.01 93.60 RRV | 2 0.02 93.62 RX | 1 0.01 93.63 S | 133 1.33 94.96 S/V | 19 0.19 95.15 S10 | 5 0.05 95.20 S15 | 23 0.23 95.43 SAF | 18 0.18 95.61 SBS | 2 0.02 95.63 SCT | 4 0.04 95.67 SIE | 76 0.76 96.43 SON | 11 0.11 96.54 SPO | 1 0.01 96.55 SPT | 4 0.04 96.59 SPX | 2 0.02 96.61 SS | 24 0.24 96.85 SXD | 2 0.02 96.87 T10 | 7 0.07 96.94 TAC | 19 0.19 97.13 TNS | 2 0.02 97.15 TOP | 4 0.04 97.19 TRA | 1 0.01 97.20 TRK | 65 0.65 97.85 UDS | 4 0.04 97.89 UHT | 3 0.03 97.92 V10 | 3 0.03 97.95 V15 | 4 0.04 97.99 V20 | 1 0.01 98.00 V30 | 1 0.01 98.01 V35 | 1 0.01 98.02 VAN | 100 1.00 99.02 VMX | 1 0.01 99.03 VWG | 9 0.09 99.12 W/T | 1 0.01 99.13 W/Y | 17 0.17 99.30 W10 | 4 0.04 99.34 W15 | 1 0.01 99.35 W20 | 6 0.06 99.41 W30 | 4 0.04 99.45 W51 | 1 0.01 99.46 WAG | 7 0.07 99.53 WCN | 6 0.06 99.59 WHC | 1 0.01 99.60 WLC | 1 0.01 99.61 WMX | 1 0.01 99.62 WRA | 3 0.03 99.65 X44 | 15 0.15 99.80 XCB | 14 0.14 99.94 XCN | 1 0.01 99.95 XPD | 1 0.01 99.96 YUK | 3 0.03 99.99 Z2T | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016