Frequencies for vin_1 variable in vehicle dataset :

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          3        0.55        0.55
          1 |        118       21.69       22.24
          2 |         46        8.46       30.70
          3 |         13        2.39       33.09
          4 |         16        2.94       36.03
          5 |          9        1.65       37.68
          6 |          1        0.18       37.87
          9 |         52        9.56       47.43
          B |          1        0.18       47.61
          J |        223       40.99       88.60
          K |         31        5.70       94.30
          L |         19        3.49       97.79
          R |          4        0.74       98.53
          S |          1        0.18       98.71
          W |          4        0.74       99.45
          Y |          2        0.37       99.82
          Z |          1        0.18      100.00
------------+-----------------------------------
      Total |        544      100.00

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