Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 27 0.27 0.27 *** | 5,090 50.90 51.17 10S | 1 0.01 51.18 200 | 2 0.02 51.20 20S | 1 0.01 51.21 250 | 2 0.02 51.23 3/4 | 1 0.01 51.24 30S | 3 0.03 51.27 400 | 2 0.02 51.29 40S | 23 0.23 51.52 44P | 37 0.37 51.89 500 | 1 0.01 51.90 600 | 44 0.44 52.34 620 | 2 0.02 52.36 700 | 4 0.04 52.40 720 | 31 0.31 52.71 80S | 11 0.11 52.82 830 | 1 0.01 52.83 90S | 43 0.43 53.26 910 | 1 0.01 53.27 920 | 16 0.16 53.43 930 | 5 0.05 53.48 937 | 3 0.03 53.51 999 | 708 7.08 60.59 ACL | 1 0.01 60.60 AMI | 2 0.02 60.62 ARO | 78 0.78 61.40 AST | 62 0.62 62.02 B20 | 13 0.13 62.15 B22 | 15 0.15 62.30 B23 | 11 0.11 62.41 B26 | 7 0.07 62.48 B30 | 3 0.03 62.51 B40 | 2 0.02 62.53 BII | 35 0.35 62.88 BRA | 2 0.02 62.90 BRO | 39 0.39 63.29 BUS | 2 0.02 63.31 BVN | 7 0.07 63.38 BZR | 34 0.34 63.72 C10 | 87 0.87 64.59 C15 | 38 0.38 64.97 C20 | 25 0.25 65.22 C25 | 8 0.08 65.30 C30 | 12 0.12 65.42 C35 | 3 0.03 65.45 C50 | 1 0.01 65.46 C60 | 3 0.03 65.49 C6M | 1 0.01 65.50 C6V | 5 0.05 65.55 C96 | 9 0.09 65.64 C97 | 3 0.03 65.67 CAB | 1 0.01 65.68 CAR | 67 0.67 66.35 CCH | 3 0.03 66.38 CGS | 5 0.05 66.43 CHA | 3 0.03 66.46 CHK | 52 0.52 66.98 CLF | 1 0.01 66.99 CLT | 2 0.02 67.01 CLU | 14 0.14 67.15 CNV | 3 0.03 67.18 COE | 55 0.55 67.73 COF | 370 3.70 71.43 COH | 7 0.07 71.50 COL | 19 0.19 71.69 COM | 8 0.08 71.77 CON | 303 3.03 74.80 COU | 7 0.07 74.87 CRV | 1 0.01 74.88 CSC | 3 0.03 74.91 CSR | 1 0.01 74.92 CTA | 4 0.04 74.96 CTS | 3 0.03 74.99 CTV | 21 0.21 75.20 CVS | 17 0.17 75.37 CWS | 10 0.10 75.47 D10 | 6 0.06 75.53 D15 | 14 0.14 75.67 D20 | 7 0.07 75.74 D21 | 42 0.42 76.16 D30 | 3 0.03 76.19 D40 | 1 0.01 76.20 D51 | 2 0.02 76.22 D5I | 10 0.10 76.32 DAK | 58 0.58 76.90 DIS | 5 0.05 76.95 DRW | 1 0.01 76.96 DUR | 3 0.03 76.99 ELC | 1 0.01 77.00 ENV | 1 0.01 77.01 EPR | 102 1.02 78.03 EPT | 18 0.18 78.21 EXP | 1 0.01 78.22 FCC | 3 0.03 78.25 FE6 | 1 0.01 78.26 FH9 | 1 0.01 78.27 FK5 | 1 0.01 78.28 FM5 | 1 0.01 78.29 FOR | 2 0.02 78.31 FRT | 2 0.02 78.33 FSR | 1 0.01 78.34 FTR | 1 0.01 78.35 GCK | 41 0.41 78.76 GEO | 15 0.15 78.91 GM4 | 260 2.60 81.51 H95 | 4 0.04 81.55 HFD | 1 0.01 81.56 HFF | 1 0.01 81.57 HIC | 1 0.01 81.58 HLX | 1 0.01 81.59 HOM | 1 0.01 81.60 HTC | 1 0.01 81.61 HTP | 151 1.51 83.12 INT | 3 0.03 83.15 J95 | 2 0.02 83.17 JEE | 17 0.17 83.34 JET | 1 0.01 83.35 JMY | 7 0.07 83.42 K10 | 44 0.44 83.86 K15 | 30 0.30 84.16 K20 | 10 0.10 84.26 K25 | 9 0.09 84.35 K30 | 4 0.04 84.39 K35 | 1 0.01 84.40 KOD | 6 0.06 84.46 KTA | 12 0.12 84.58 L/M | 5 0.05 84.63 LCH | 3 0.03 84.66 LCW | 5 0.05 84.71 LDS | 2 0.02 84.73 LLN | 2 0.02 84.75 LTC | 2 0.02 84.77 LUV | 2 0.02 84.79 LX4 | 1 0.01 84.80 MAX | 2 0.02 84.82 MC2 | 4 0.04 84.86 MCV | 13 0.13 84.99 MHV | 15 0.15 85.14 ML3 | 1 0.01 85.15 MMX | 14 0.14 85.29 MNS | 4 0.04 85.33 MON | 6 0.06 85.39 MOU | 3 0.03 85.42 MRM | 2 0.02 85.44 MVN | 1 0.01 85.45 MWG | 22 0.22 85.67 MXV | 1 0.01 85.68 MXW | 1 0.01 85.69 NAV | 4 0.04 85.73 NPR | 7 0.07 85.80 NRR | 3 0.03 85.83 ODY | 5 0.05 85.88 P30 | 13 0.13 86.01 P42 | 1 0.01 86.02 P62 | 3 0.03 86.05 PAS | 7 0.07 86.12 PCC | 3 0.03 86.15 PFI | 30 0.30 86.45 PRE | 8 0.08 86.53 PUP | 3 0.03 86.56 QST | 13 0.13 86.69 R/V | 10 0.10 86.79 R15 | 1 0.01 86.80 R20 | 1 0.01 86.81 R25 | 1 0.01 86.82 R30 | 1 0.01 86.83 R35 | 3 0.03 86.86 R50 | 10 0.10 86.96 RAI | 2 0.02 86.98 RAL | 3 0.03 87.01 RAM | 4 0.04 87.05 RMV | 22 0.22 87.27 RMW | 23 0.23 87.50 RNG | 194 1.94 89.44 ROD | 22 0.22 89.66 RPC | 83 0.83 90.49 RRV | 5 0.05 90.54 RUN | 74 0.74 91.28 RV4 | 5 0.05 91.33 S | 140 1.40 92.73 S/V | 28 0.28 93.01 S10 | 54 0.54 93.55 S15 | 11 0.11 93.66 S6M | 1 0.01 93.67 SAF | 16 0.16 93.83 SBS | 1 0.01 93.84 SCR | 1 0.01 93.85 SCT | 3 0.03 93.88 SDK | 9 0.09 93.97 SIE | 67 0.67 94.64 SIL | 6 0.06 94.70 SMR | 8 0.08 94.78 SON | 16 0.16 94.94 SPO | 7 0.07 95.01 SPT | 3 0.03 95.04 SRW | 4 0.04 95.08 SS | 15 0.15 95.23 T10 | 6 0.06 95.29 T65 | 1 0.01 95.30 TAC | 36 0.36 95.66 TNS | 1 0.01 95.67 TOP | 5 0.05 95.72 TRA | 3 0.03 95.75 TRK | 67 0.67 96.42 TRL | 3 0.03 96.45 TRO | 18 0.18 96.63 TSP | 5 0.05 96.68 TSR | 1 0.01 96.69 TWC | 5 0.05 96.74 UDS | 1 0.01 96.75 UHT | 3 0.03 96.78 UNI | 1 0.01 96.79 V10 | 8 0.08 96.87 V15 | 6 0.06 96.93 V20 | 2 0.02 96.95 V25 | 2 0.02 96.97 V35 | 1 0.01 96.98 VAN | 110 1.10 98.08 VFE | 1 0.01 98.09 VGN | 3 0.03 98.12 VLR | 5 0.05 98.17 VMX | 1 0.01 98.18 VOF | 55 0.55 98.73 VTR | 5 0.05 98.78 VVN | 6 0.06 98.84 VWG | 6 0.06 98.90 W/T | 9 0.09 98.99 W/Y | 31 0.31 99.30 W10 | 1 0.01 99.31 W15 | 2 0.02 99.33 W20 | 6 0.06 99.39 W30 | 1 0.01 99.40 W51 | 2 0.02 99.42 WAG | 6 0.06 99.48 WCN | 5 0.05 99.53 WHC | 1 0.01 99.54 WIN | 17 0.17 99.71 WLC | 1 0.01 99.72 WMX | 3 0.03 99.75 WRA | 2 0.02 99.77 X44 | 11 0.11 99.88 XCB | 2 0.02 99.90 XCN | 3 0.03 99.93 YUK | 7 0.07 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016