Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN | Series-Truc | k | Freq. Percent Cum. ------------+----------------------------------- | 3 0.03 0.03 *** | 6,083 60.83 60.86 150 | 2 0.02 60.88 250 | 1 0.01 60.89 44P | 84 0.84 61.73 600 | 25 0.25 61.98 620 | 27 0.27 62.25 700 | 4 0.04 62.29 720 | 89 0.89 63.18 930 | 2 0.02 63.20 937 | 6 0.06 63.26 999 | 1,196 11.96 75.22 A10 | 1 0.01 75.23 ARO | 1 0.01 75.24 ART | 1 0.01 75.25 AST | 11 0.11 75.36 B20 | 29 0.29 75.65 B22 | 11 0.11 75.76 B26 | 3 0.03 75.79 BRO | 6 0.06 75.85 BRT | 1 0.01 75.86 C/C | 4 0.04 75.90 C10 | 212 2.12 78.02 C15 | 56 0.56 78.58 C20 | 51 0.51 79.09 C25 | 23 0.23 79.32 C30 | 24 0.24 79.56 C35 | 8 0.08 79.64 C40 | 2 0.02 79.66 C50 | 5 0.05 79.71 C60 | 8 0.08 79.79 C65 | 3 0.03 79.82 C6M | 6 0.06 79.88 C6V | 7 0.07 79.95 C96 | 41 0.41 80.36 C97 | 4 0.04 80.40 CAB | 1 0.01 80.41 CCH | 2 0.02 80.43 CGS | 6 0.06 80.49 CHK | 15 0.15 80.64 CLS | 1 0.01 80.65 CLU | 1 0.01 80.66 COE | 66 0.66 81.32 COF | 396 3.96 85.28 COL | 16 0.16 85.44 COM | 10 0.10 85.54 CON | 89 0.89 86.43 CPU | 1 0.01 86.44 CSC | 1 0.01 86.45 CTS | 34 0.34 86.79 CTV | 13 0.13 86.92 CVS | 6 0.06 86.98 D10 | 17 0.17 87.15 D15 | 19 0.19 87.34 D20 | 11 0.11 87.45 D21 | 77 0.77 88.22 D30 | 1 0.01 88.23 D40 | 1 0.01 88.24 D50 | 1 0.01 88.25 D5I | 24 0.24 88.49 D95 | 4 0.04 88.53 DAK | 9 0.09 88.62 DC9 | 5 0.05 88.67 E55 | 1 0.01 88.68 ELC | 9 0.09 88.77 F95 | 2 0.02 88.79 FC9 | 1 0.01 88.80 FCC | 1 0.01 88.81 FH9 | 2 0.02 88.83 FLS | 3 0.03 88.86 FN9 | 1 0.01 88.87 GM4 | 27 0.27 89.14 H95 | 4 0.04 89.18 HLX | 7 0.07 89.25 HTC | 8 0.08 89.33 HTP | 122 1.22 90.55 HTW | 3 0.03 90.58 INT | 4 0.04 90.62 J95 | 4 0.04 90.66 JEE | 31 0.31 90.97 JET | 2 0.02 90.99 JI9 | 1 0.01 91.00 JJ9 | 1 0.01 91.01 JPR | 2 0.02 91.03 K10 | 61 0.61 91.64 K15 | 18 0.18 91.82 K20 | 11 0.11 91.93 K25 | 9 0.09 92.02 K30 | 5 0.05 92.07 LB1 | 4 0.04 92.11 LDS | 4 0.04 92.15 LLN | 6 0.06 92.21 LTC | 11 0.11 92.32 LUV | 1 0.01 92.33 M65 | 1 0.01 92.34 M95 | 2 0.02 92.36 MC2 | 1 0.01 92.37 MCV | 1 0.01 92.38 MHC | 1 0.01 92.39 MHV | 18 0.18 92.57 MK2 | 1 0.01 92.58 MMX | 17 0.17 92.75 MON | 1 0.01 92.76 MRM | 1 0.01 92.77 MSP | 1 0.01 92.78 MXV | 8 0.08 92.86 N95 | 1 0.01 92.87 NPR | 2 0.02 92.89 P20 | 1 0.01 92.90 P30 | 5 0.05 92.95 P52 | 4 0.04 92.99 P62 | 10 0.10 93.09 PAR | 1 0.01 93.10 PCC | 4 0.04 93.14 PFI | 7 0.07 93.21 PUP | 16 0.16 93.37 PYS | 2 0.02 93.39 R/V | 1 0.01 93.40 R10 | 10 0.10 93.50 R15 | 3 0.03 93.53 R20 | 1 0.01 93.54 R35 | 2 0.02 93.56 R50 | 9 0.09 93.65 RAM | 1 0.01 93.66 RB | 2 0.02 93.68 RC | 1 0.01 93.69 RMP | 1 0.01 93.70 RMV | 17 0.17 93.87 RNG | 115 1.15 95.02 RUN | 11 0.11 95.13 RX | 1 0.01 95.14 S | 103 1.03 96.17 S/V | 2 0.02 96.19 S10 | 2 0.02 96.21 S15 | 13 0.13 96.34 SAF | 5 0.05 96.39 SBS | 1 0.01 96.40 SCT | 4 0.04 96.44 SMR | 20 0.20 96.64 SPR | 2 0.02 96.66 SPT | 4 0.04 96.70 SPX | 1 0.01 96.71 SS | 37 0.37 97.08 SXS | 1 0.01 97.09 TNS | 16 0.16 97.25 TRO | 5 0.05 97.30 V10 | 1 0.01 97.31 V15 | 3 0.03 97.34 V20 | 1 0.01 97.35 VAN | 167 1.67 99.02 VVN | 4 0.04 99.06 VWG | 11 0.11 99.17 W10 | 8 0.08 99.25 W15 | 4 0.04 99.29 W20 | 7 0.07 99.36 WAG | 10 0.10 99.46 WCN | 4 0.04 99.50 WHC | 1 0.01 99.51 WRA | 4 0.04 99.55 X44 | 21 0.21 99.76 XCB | 21 0.21 99.97 XCO | 2 0.02 99.99 XPD | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016