Frequencies for first 10,000 rows of vin_10 variable in vehicle dataset :

        vin |
character(1 |
         0) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         33        0.33        0.33
          0 |         29        0.29        0.62
          1 |        462        4.62        5.24
          2 |        488        4.88       10.12
          3 |        561        5.61       15.73
          4 |        510        5.10       20.83
          5 |        586        5.86       26.69
          6 |        624        6.24       32.93
          7 |        618        6.18       39.11
          8 |        444        4.44       43.55
          9 |        793        7.93       51.48
          A |        320        3.20       54.68
          B |        352        3.52       58.20
          C |        423        4.23       62.43
          D |        486        4.86       67.29
          E |        524        5.24       72.53
          F |        410        4.10       76.63
          G |         59        0.59       77.22
          H |         34        0.34       77.56
          J |         30        0.30       77.86
          K |         31        0.31       78.17
          L |         68        0.68       78.85
          M |         88        0.88       79.73
          N |         95        0.95       80.68
          P |         98        0.98       81.66
          R |        134        1.34       83.00
          S |        188        1.88       84.88
          T |        184        1.84       86.72
          V |        273        2.73       89.45
          W |        295        2.95       92.40
          X |        350        3.50       95.90
          Y |        410        4.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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