Frequencies for first 10,000 rows of vin_12 variable in vehicle dataset :

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        395        3.95        3.95
          0 |      1,598       15.98       19.93
          1 |      2,094       20.94       40.87
          2 |      1,223       12.23       53.10
          3 |        764        7.64       60.74
          4 |        496        4.96       65.70
          5 |        727        7.27       72.97
          6 |        559        5.59       78.56
          7 |        430        4.30       82.86
          8 |        234        2.34       85.20
          9 |        477        4.77       89.97
          A |        516        5.16       95.13
          B |        287        2.87       98.00
          C |        102        1.02       99.02
          D |         38        0.38       99.40
          E |          8        0.08       99.48
          F |          3        0.03       99.51
          H |          1        0.01       99.52
          J |         13        0.13       99.65
          K |          2        0.02       99.67
          L |          1        0.01       99.68
          M |         21        0.21       99.89
          N |          1        0.01       99.90
          S |          3        0.03       99.93
          T |          2        0.02       99.95
          V |          2        0.02       99.97
          W |          1        0.01       99.98
          Y |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016