Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN SERIES | TRUCK | Freq. Percent Cum. ------------+----------------------------------- | 103 1.03 1.03 *** | 6,217 62.17 63.20 10S | 2 0.02 63.22 150 | 1 0.01 63.23 200 | 2 0.02 63.25 20S | 2 0.02 63.27 250 | 2 0.02 63.29 400 | 1 0.01 63.30 40S | 21 0.21 63.51 44P | 36 0.36 63.87 600 | 41 0.41 64.28 620 | 6 0.06 64.34 700 | 3 0.03 64.37 720 | 34 0.34 64.71 80S | 7 0.07 64.78 830 | 3 0.03 64.81 90S | 52 0.52 65.33 920 | 6 0.06 65.39 930 | 4 0.04 65.43 937 | 1 0.01 65.44 999 | 493 4.93 70.37 ACL | 2 0.02 70.39 ARO | 38 0.38 70.77 ART | 1 0.01 70.78 AST | 17 0.17 70.95 B20 | 20 0.20 71.15 B22 | 16 0.16 71.31 B23 | 4 0.04 71.35 B25 | 1 0.01 71.36 B26 | 2 0.02 71.38 B30 | 1 0.01 71.39 B40 | 3 0.03 71.42 BRA | 2 0.02 71.44 BRO | 9 0.09 71.53 BUS | 1 0.01 71.54 BVN | 17 0.17 71.71 BZR | 1 0.01 71.72 C/C | 1 0.01 71.73 C10 | 99 0.99 72.72 C15 | 23 0.23 72.95 C20 | 35 0.35 73.30 C25 | 5 0.05 73.35 C30 | 12 0.12 73.47 C35 | 2 0.02 73.49 C60 | 1 0.01 73.50 C65 | 1 0.01 73.51 C6M | 2 0.02 73.53 C6V | 4 0.04 73.57 C96 | 16 0.16 73.73 C97 | 2 0.02 73.75 CAB | 1 0.01 73.76 CAR | 1 0.01 73.77 CCH | 5 0.05 73.82 CDC | 1 0.01 73.83 CHA | 2 0.02 73.85 CHK | 80 0.80 74.65 CLT | 3 0.03 74.68 CLU | 2 0.02 74.70 CNV | 7 0.07 74.77 COE | 59 0.59 75.36 COF | 406 4.06 79.42 COH | 1 0.01 79.43 COL | 26 0.26 79.69 COM | 10 0.10 79.79 CON | 308 3.08 82.87 COU | 3 0.03 82.90 CSC | 2 0.02 82.92 CTS | 5 0.05 82.97 CTV | 24 0.24 83.21 CVS | 20 0.20 83.41 D10 | 4 0.04 83.45 D15 | 9 0.09 83.54 D20 | 9 0.09 83.63 D21 | 49 0.49 84.12 D30 | 6 0.06 84.18 D51 | 1 0.01 84.19 D5I | 9 0.09 84.28 DAK | 49 0.49 84.77 DIS | 3 0.03 84.80 ELC | 1 0.01 84.81 FCC | 2 0.02 84.83 FE4 | 1 0.01 84.84 FK4 | 1 0.01 84.85 GCK | 47 0.47 85.32 GM4 | 204 2.04 87.36 H95 | 1 0.01 87.37 HFB | 1 0.01 87.38 HFD | 2 0.02 87.40 HFE | 1 0.01 87.41 HIC | 2 0.02 87.43 HLX | 2 0.02 87.45 HSG | 1 0.01 87.46 HTC | 1 0.01 87.47 HTP | 142 1.42 88.89 INT | 3 0.03 88.92 JEE | 19 0.19 89.11 JET | 3 0.03 89.14 JMY | 8 0.08 89.22 K10 | 29 0.29 89.51 K15 | 14 0.14 89.65 K20 | 9 0.09 89.74 K25 | 2 0.02 89.76 K30 | 1 0.01 89.77 K35 | 1 0.01 89.78 KOD | 1 0.01 89.79 LB1 | 5 0.05 89.84 LBD | 1 0.01 89.85 LCH | 3 0.03 89.88 LLN | 2 0.02 89.90 LTC | 2 0.02 89.92 LUV | 3 0.03 89.95 MAX | 1 0.01 89.96 MCV | 2 0.02 89.98 MHV | 23 0.23 90.21 MMX | 19 0.19 90.40 MRM | 2 0.02 90.42 MVN | 1 0.01 90.43 NAV | 1 0.01 90.44 NPR | 4 0.04 90.48 NRR | 2 0.02 90.50 P30 | 7 0.07 90.57 P42 | 1 0.01 90.58 PUP | 4 0.04 90.62 R/V | 4 0.04 90.66 R10 | 5 0.05 90.71 R15 | 4 0.04 90.75 R20 | 1 0.01 90.76 R25 | 2 0.02 90.78 R30 | 1 0.01 90.79 R35 | 2 0.02 90.81 R50 | 6 0.06 90.87 RAI | 2 0.02 90.89 RAL | 2 0.02 90.91 RAM | 1 0.01 90.92 RAN | 4 0.04 90.96 RBT | 2 0.02 90.98 RMV | 30 0.30 91.28 RNG | 186 1.86 93.14 RPC | 50 0.50 93.64 RRV | 4 0.04 93.68 S | 137 1.37 95.05 S/V | 13 0.13 95.18 S10 | 3 0.03 95.21 S15 | 21 0.21 95.42 SAF | 9 0.09 95.51 SCR | 1 0.01 95.52 SCT | 3 0.03 95.55 SIE | 80 0.80 96.35 SON | 22 0.22 96.57 SPR | 1 0.01 96.58 SPT | 3 0.03 96.61 SS | 17 0.17 96.78 T10 | 12 0.12 96.90 TAC | 24 0.24 97.14 THG | 1 0.01 97.15 TNS | 2 0.02 97.17 TOP | 8 0.08 97.25 TRA | 3 0.03 97.28 TRK | 49 0.49 97.77 TRO | 1 0.01 97.78 TYP | 1 0.01 97.79 UDS | 2 0.02 97.81 UHT | 2 0.02 97.83 UNI | 1 0.01 97.84 V10 | 2 0.02 97.86 V15 | 6 0.06 97.92 V25 | 1 0.01 97.93 V30 | 1 0.01 97.94 V35 | 1 0.01 97.95 VAN | 105 1.05 99.00 VMX | 2 0.02 99.02 VVN | 1 0.01 99.03 VWG | 8 0.08 99.11 W/T | 4 0.04 99.15 W/Y | 25 0.25 99.40 W10 | 2 0.02 99.42 W15 | 2 0.02 99.44 W20 | 6 0.06 99.50 WAG | 5 0.05 99.55 WCN | 10 0.10 99.65 WHC | 1 0.01 99.66 WLC | 1 0.01 99.67 WMX | 1 0.01 99.68 WRA | 2 0.02 99.70 X44 | 12 0.12 99.82 XCB | 8 0.08 99.90 XCN | 2 0.02 99.92 XPD | 5 0.05 99.97 YUK | 2 0.02 99.99 Z23 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016