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

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         76        0.76        0.76
          0 |      1,755       17.55       18.31
          1 |      2,156       21.56       39.87
          2 |      1,150       11.50       51.37
          3 |        690        6.90       58.27
          4 |        494        4.94       63.21
          5 |        726        7.26       70.47
          6 |        572        5.72       76.19
          7 |        376        3.76       79.95
          8 |        209        2.09       82.04
          9 |        435        4.35       86.39
          A |        439        4.39       90.78
          B |        310        3.10       93.88
          C |        163        1.63       95.51
          D |         77        0.77       96.28
          E |         22        0.22       96.50
          F |         16        0.16       96.66
          G |         16        0.16       96.82
          H |          6        0.06       96.88
          J |         66        0.66       97.54
          K |         23        0.23       97.77
          L |         16        0.16       97.93
          M |         41        0.41       98.34
          N |         28        0.28       98.62
          P |          8        0.08       98.70
          R |          7        0.07       98.77
          S |          8        0.08       98.85
          T |          9        0.09       98.94
          U |         22        0.22       99.16
          V |         19        0.19       99.35
          W |         25        0.25       99.60
          X |         16        0.16       99.76
          Y |         15        0.15       99.91
          Z |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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