Frequencies for vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         18        2.51        2.51
          1 |         15        2.09        4.61
          2 |         11        1.54        6.15
          3 |         11        1.54        7.68
          4 |          6        0.84        8.52
          5 |          7        0.98        9.50
          6 |          1        0.14        9.64
          7 |         13        1.82       11.45
          8 |          5        0.70       12.15
          9 |         53        7.40       19.55
          A |        106       14.80       34.36
          B |         52        7.26       41.62
          C |         49        6.84       48.46
          D |         24        3.35       51.82
          E |         63        8.80       60.61
          F |         29        4.05       64.66
          G |         29        4.05       68.72
          H |         20        2.79       71.51
          J |         30        4.19       75.70
          K |          5        0.70       76.40
          L |         15        2.09       78.49
          M |         16        2.23       80.73
          N |          7        0.98       81.70
          P |         28        3.91       85.61
          R |         15        2.09       87.71
          S |         15        2.09       89.80
          T |          8        1.12       90.92
          U |          7        0.98       91.90
          V |         24        3.35       95.25
          W |         17        2.37       97.63
          X |          7        0.98       98.60
          Y |          6        0.84       99.44
          Z |          4        0.56      100.00
------------+-----------------------------------
      Total |        716      100.00

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