Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN | Series-Truc | k | Freq. Percent Cum. ------------+----------------------------------- | 18 0.18 0.18 *** | 6,016 60.16 60.34 150 | 6 0.06 60.40 3/4 | 6 0.06 60.46 44P | 58 0.58 61.04 600 | 3 0.03 61.07 620 | 44 0.44 61.51 700 | 2 0.02 61.53 720 | 60 0.60 62.13 999 | 1,706 17.06 79.19 A10 | 3 0.03 79.22 ART | 6 0.06 79.28 B20 | 13 0.13 79.41 BII | 9 0.09 79.50 BRO | 16 0.16 79.66 BRT | 2 0.02 79.68 C/C | 1 0.01 79.69 C10 | 224 2.24 81.93 C15 | 50 0.50 82.43 C20 | 76 0.76 83.19 C25 | 21 0.21 83.40 C30 | 29 0.29 83.69 C35 | 9 0.09 83.78 C50 | 7 0.07 83.85 C60 | 10 0.10 83.95 C65 | 4 0.04 83.99 C6M | 4 0.04 84.03 C6V | 6 0.06 84.09 C96 | 15 0.15 84.24 CAB | 2 0.02 84.26 CGS | 5 0.05 84.31 CHA | 1 0.01 84.32 CHK | 7 0.07 84.39 CLU | 7 0.07 84.46 COE | 59 0.59 85.05 COF | 347 3.47 88.52 COL | 12 0.12 88.64 CON | 65 0.65 89.29 COU | 46 0.46 89.75 CPU | 2 0.02 89.77 CSC | 2 0.02 89.79 CTS | 53 0.53 90.32 CTV | 7 0.07 90.39 CWS | 1 0.01 90.40 D10 | 16 0.16 90.56 D15 | 9 0.09 90.65 D20 | 15 0.15 90.80 D30 | 3 0.03 90.83 D40 | 2 0.02 90.85 D5I | 28 0.28 91.13 D95 | 7 0.07 91.20 DC9 | 3 0.03 91.23 DH9 | 3 0.03 91.26 ELC | 9 0.09 91.35 FCC | 1 0.01 91.36 FJ9 | 1 0.01 91.37 FLS | 4 0.04 91.41 G15 | 1 0.01 91.42 G40 | 1 0.01 91.43 H75 | 1 0.01 91.44 H95 | 4 0.04 91.48 HIC | 2 0.02 91.50 HLX | 11 0.11 91.61 HTC | 4 0.04 91.65 HTP | 85 0.85 92.50 HTW | 3 0.03 92.53 J95 | 2 0.02 92.55 JEE | 24 0.24 92.79 JET | 3 0.03 92.82 JI9 | 2 0.02 92.84 JJ9 | 1 0.01 92.85 K10 | 86 0.86 93.71 K15 | 11 0.11 93.82 K20 | 12 0.12 93.94 K25 | 5 0.05 93.99 K30 | 3 0.03 94.02 K35 | 2 0.02 94.04 KOM | 8 0.08 94.12 LBD | 2 0.02 94.14 LCH | 2 0.02 94.16 LDS | 4 0.04 94.20 LLN | 5 0.05 94.25 LSB | 1 0.01 94.26 LTC | 9 0.09 94.35 LUV | 41 0.41 94.76 M65 | 1 0.01 94.77 M6V | 1 0.01 94.78 M95 | 1 0.01 94.79 MHC | 3 0.03 94.82 MHV | 19 0.19 95.01 MK2 | 1 0.01 95.02 MSP | 2 0.02 95.04 MXV | 5 0.05 95.09 MXW | 2 0.02 95.11 N95 | 4 0.04 95.15 P30 | 4 0.04 95.19 P52 | 9 0.09 95.28 P62 | 17 0.17 95.45 PAR | 2 0.02 95.47 PCC | 7 0.07 95.54 PYS | 2 0.02 95.56 R/V | 1 0.01 95.57 RAM | 7 0.07 95.64 RAN | 1 0.01 95.65 RBT | 1 0.01 95.66 RMV | 11 0.11 95.77 RMW | 2 0.02 95.79 RNG | 42 0.42 96.21 RX | 5 0.05 96.26 S | 39 0.39 96.65 S/V | 1 0.01 96.66 S10 | 14 0.14 96.80 S15 | 2 0.02 96.82 SCP | 1 0.01 96.83 SCT | 9 0.09 96.92 SPO | 7 0.07 96.99 SPT | 16 0.16 97.15 SS | 20 0.20 97.35 T65 | 3 0.03 97.38 T6V | 1 0.01 97.39 TMX | 2 0.02 97.41 TNS | 13 0.13 97.54 TRA | 10 0.10 97.64 UNI | 1 0.01 97.65 VAN | 191 1.91 99.56 VGN | 1 0.01 99.57 VOY | 1 0.01 99.58 VVN | 1 0.01 99.59 W10 | 8 0.08 99.67 W15 | 3 0.03 99.70 W20 | 6 0.06 99.76 WAG | 3 0.03 99.79 WCN | 3 0.03 99.82 WHC | 1 0.01 99.83 WLC | 2 0.02 99.85 X44 | 5 0.05 99.90 XCB | 5 0.05 99.95 XCO | 5 0.05 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016