Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 176 1.76 1.76 *** | 6,291 62.91 64.67 150 | 3 0.03 64.70 200 | 1 0.01 64.71 250 | 4 0.04 64.75 3/4 | 2 0.02 64.77 300 | 2 0.02 64.79 30S | 1 0.01 64.80 400 | 3 0.03 64.83 40S | 11 0.11 64.94 44P | 56 0.56 65.50 600 | 43 0.43 65.93 620 | 11 0.11 66.04 700 | 2 0.02 66.06 720 | 58 0.58 66.64 80S | 11 0.11 66.75 830 | 1 0.01 66.76 90S | 22 0.22 66.98 920 | 2 0.02 67.00 930 | 6 0.06 67.06 937 | 3 0.03 67.09 999 | 502 5.02 72.11 ARO | 25 0.25 72.36 AST | 16 0.16 72.52 B20 | 20 0.20 72.72 B22 | 7 0.07 72.79 B23 | 1 0.01 72.80 B26 | 7 0.07 72.87 B40 | 2 0.02 72.89 BRA | 1 0.01 72.90 BRO | 14 0.14 73.04 BSP | 6 0.06 73.10 BUS | 3 0.03 73.13 BVN | 11 0.11 73.24 C/C | 1 0.01 73.25 C10 | 133 1.33 74.58 C15 | 34 0.34 74.92 C20 | 27 0.27 75.19 C25 | 16 0.16 75.35 C30 | 17 0.17 75.52 C35 | 7 0.07 75.59 C50 | 2 0.02 75.61 C5M | 1 0.01 75.62 C60 | 2 0.02 75.64 C65 | 2 0.02 75.66 C6M | 1 0.01 75.67 C6V | 8 0.08 75.75 C96 | 13 0.13 75.88 C97 | 5 0.05 75.93 CAB | 1 0.01 75.94 CBF | 1 0.01 75.95 CCH | 11 0.11 76.06 CD2 | 1 0.01 76.07 CGS | 2 0.02 76.09 CHK | 56 0.56 76.65 CLT | 4 0.04 76.69 CLU | 9 0.09 76.78 CNV | 1 0.01 76.79 COE | 68 0.68 77.47 COF | 349 3.49 80.96 COL | 21 0.21 81.17 COM | 8 0.08 81.25 CON | 229 2.29 83.54 COU | 8 0.08 83.62 CSC | 2 0.02 83.64 CTP | 1 0.01 83.65 CTS | 10 0.10 83.75 CTV | 18 0.18 83.93 CVS | 9 0.09 84.02 CWS | 1 0.01 84.03 D10 | 5 0.05 84.08 D15 | 16 0.16 84.24 D20 | 13 0.13 84.37 D21 | 49 0.49 84.86 D30 | 9 0.09 84.95 D51 | 6 0.06 85.01 D5I | 10 0.10 85.11 D60 | 1 0.01 85.12 D95 | 1 0.01 85.13 DAK | 41 0.41 85.54 DIS | 1 0.01 85.55 DKM | 1 0.01 85.56 ELC | 5 0.05 85.61 FC9 | 1 0.01 85.62 FE4 | 1 0.01 85.63 FE6 | 1 0.01 85.64 FH9 | 1 0.01 85.65 FSR | 1 0.01 85.66 FTR | 2 0.02 85.68 GCK | 21 0.21 85.89 GEO | 1 0.01 85.90 GM4 | 184 1.84 87.74 HFB | 1 0.01 87.75 HLX | 2 0.02 87.77 HTC | 2 0.02 87.79 HTP | 157 1.57 89.36 HV7 | 1 0.01 89.37 J95 | 2 0.02 89.39 JC9 | 1 0.01 89.40 JEE | 35 0.35 89.75 JET | 1 0.01 89.76 JPR | 1 0.01 89.77 JY7 | 1 0.01 89.78 K10 | 51 0.51 90.29 K15 | 14 0.14 90.43 K20 | 10 0.10 90.53 K25 | 6 0.06 90.59 K35 | 1 0.01 90.60 KOM | 2 0.02 90.62 L17 | 1 0.01 90.63 LB1 | 5 0.05 90.68 LCH | 2 0.02 90.70 LCW | 1 0.01 90.71 LDS | 3 0.03 90.74 LLN | 2 0.02 90.76 LP1 | 1 0.01 90.77 LTC | 2 0.02 90.79 LUV | 9 0.09 90.88 M95 | 1 0.01 90.89 MAX | 3 0.03 90.92 MCV | 2 0.02 90.94 MHC | 2 0.02 90.96 MHV | 17 0.17 91.13 MMX | 16 0.16 91.29 N80 | 1 0.01 91.30 NAV | 2 0.02 91.32 NPR | 8 0.08 91.40 P30 | 14 0.14 91.54 P42 | 1 0.01 91.55 P52 | 1 0.01 91.56 P62 | 2 0.02 91.58 PCC | 5 0.05 91.63 PUP | 4 0.04 91.67 PYS | 1 0.01 91.68 R/V | 5 0.05 91.73 R10 | 5 0.05 91.78 R15 | 2 0.02 91.80 R25 | 1 0.01 91.81 R30 | 6 0.06 91.87 R35 | 1 0.01 91.88 R50 | 11 0.11 91.99 RAI | 3 0.03 92.02 RAL | 2 0.02 92.04 RAM | 4 0.04 92.08 RAN | 2 0.02 92.10 RMV | 17 0.17 92.27 RNG | 151 1.51 93.78 RPC | 9 0.09 93.87 RPU | 1 0.01 93.88 RRV | 2 0.02 93.90 S | 141 1.41 95.31 S/V | 17 0.17 95.48 S10 | 3 0.03 95.51 S15 | 21 0.21 95.72 S50 | 1 0.01 95.73 S6M | 2 0.02 95.75 SAF | 9 0.09 95.84 SBS | 3 0.03 95.87 SCT | 5 0.05 95.92 SIE | 47 0.47 96.39 SON | 12 0.12 96.51 SPO | 1 0.01 96.52 SPT | 7 0.07 96.59 SPX | 1 0.01 96.60 SS | 19 0.19 96.79 SXD | 1 0.01 96.80 SYC | 1 0.01 96.81 T10 | 2 0.02 96.83 T60 | 1 0.01 96.84 T65 | 1 0.01 96.85 T6V | 1 0.01 96.86 TNS | 4 0.04 96.90 TOP | 3 0.03 96.93 TRA | 1 0.01 96.94 TRK | 37 0.37 97.31 UDS | 2 0.02 97.33 UHT | 3 0.03 97.36 UNI | 3 0.03 97.39 V15 | 4 0.04 97.43 V25 | 1 0.01 97.44 VAN | 138 1.38 98.82 VFE | 2 0.02 98.84 VMX | 4 0.04 98.88 VVN | 2 0.02 98.90 VWG | 10 0.10 99.00 W/Y | 30 0.30 99.30 W10 | 3 0.03 99.33 W15 | 6 0.06 99.39 W20 | 12 0.12 99.51 W30 | 1 0.01 99.52 W51 | 1 0.01 99.53 WAG | 7 0.07 99.60 WCN | 9 0.09 99.69 WHC | 2 0.02 99.71 WMX | 1 0.01 99.72 WRA | 5 0.05 99.77 X44 | 7 0.07 99.84 XCB | 12 0.12 99.96 XCO | 1 0.01 99.97 YUK | 2 0.02 99.99 Z2T | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016