Frequencies for vin_1 variable in vehicle dataset :

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         13        1.82        1.82
          1 |        182       25.42       27.23
          2 |         39        5.45       32.68
          3 |         21        2.93       35.61
          4 |         18        2.51       38.13
          6 |          7        0.98       39.11
          8 |          4        0.56       39.66
          9 |         48        6.70       46.37
          A |          4        0.56       46.93
          B |          1        0.14       47.07
          C |          6        0.84       47.91
          F |          5        0.70       48.60
          G |          1        0.14       48.74
          H |          4        0.56       49.30
          J |        288       40.22       89.53
          K |         42        5.87       95.39
          P |          2        0.28       95.67
          R |          2        0.28       95.95
          S |          2        0.28       96.23
          T |          7        0.98       97.21
          U |          1        0.14       97.35
          V |          1        0.14       97.49
          W |         13        1.82       99.30
          Y |          5        0.70      100.00
------------+-----------------------------------
      Total |        716      100.00

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