Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

        vin |
character(4 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         44        0.44        0.44
          1 |        410        4.10        4.54
          2 |         27        0.27        4.81
          3 |         32        0.32        5.13
          4 |         46        0.46        5.59
          5 |         50        0.50        6.09
          6 |         28        0.28        6.37
          7 |         23        0.23        6.60
          8 |         18        0.18        6.78
          9 |        388        3.88       10.66
          A |        666        6.66       17.32
          B |        788        7.88       25.20
          C |        743        7.43       32.63
          D |        600        6.00       38.63
          E |        864        8.64       47.27
          F |        689        6.89       54.16
          G |        573        5.73       59.89
          H |        596        5.96       65.85
          J |        296        2.96       68.81
          K |        238        2.38       71.19
          L |        160        1.60       72.79
          M |        134        1.34       74.13
          N |        230        2.30       76.43
          P |        206        2.06       78.49
          R |        563        5.63       84.12
          S |        315        3.15       87.27
          T |         93        0.93       88.20
          U |         93        0.93       89.13
          V |        154        1.54       90.67
          W |        304        3.04       93.71
          X |         32        0.32       94.03
          Y |        211        2.11       96.14
          Z |        386        3.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016