Frequencies for first 10,000 rows of ser_tr variable in vehicle dataset : VIN | Series-Truc | k | Freq. Percent Cum. ------------+----------------------------------- | 26 0.26 0.26 *** | 4,204 42.04 42.30 620 | 3 0.03 42.33 999 | 4,733 47.33 89.66 A10 | 4 0.04 89.70 BR0 | 2 0.02 89.72 BRO | 14 0.14 89.86 C10 | 171 1.71 91.57 C20 | 53 0.53 92.10 C30 | 14 0.14 92.24 C50 | 15 0.15 92.39 C60 | 11 0.11 92.50 C65 | 4 0.04 92.54 CHK | 1 0.01 92.55 CLU | 3 0.03 92.58 COF | 259 2.59 95.17 COL | 8 0.08 95.25 COM | 1 0.01 95.26 CON | 10 0.10 95.36 COU | 20 0.20 95.56 CPU | 4 0.04 95.60 D10 | 22 0.22 95.82 D20 | 15 0.15 95.97 D60 | 1 0.01 95.98 DC9 | 1 0.01 95.99 ELC | 33 0.33 96.32 HI9 | 1 0.01 96.33 HLX | 12 0.12 96.45 HTW | 5 0.05 96.50 HV7 | 1 0.01 96.51 J90 | 1 0.01 96.52 JEE | 3 0.03 96.55 JPR | 1 0.01 96.56 JV7 | 1 0.01 96.57 K10 | 41 0.41 96.98 K20 | 16 0.16 97.14 KOM | 8 0.08 97.22 KRV | 1 0.01 97.23 L60 | 1 0.01 97.24 LCH | 2 0.02 97.26 LTC | 17 0.17 97.43 LUV | 15 0.15 97.58 M65 | 2 0.02 97.60 MHC | 1 0.01 97.61 MHV | 29 0.29 97.90 MXV | 5 0.05 97.95 MXW | 1 0.01 97.96 P30 | 3 0.03 97.99 P52 | 8 0.08 98.07 P62 | 26 0.26 98.33 PAR | 3 0.03 98.36 PL5 | 6 0.06 98.42 RAN | 20 0.20 98.62 RPU | 2 0.02 98.64 SCO | 1 0.01 98.65 SPO | 4 0.04 98.69 SPT | 2 0.02 98.71 T80 | 1 0.01 98.72 TRA | 12 0.12 98.84 VAN | 92 0.92 99.76 VEG | 2 0.02 99.78 VOY | 1 0.01 99.79 W10 | 13 0.13 99.92 W20 | 7 0.07 99.99 WAG | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Apr 2016