Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

        vin |
character(2 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         23        0.23        0.23
          1 |         15        0.15        0.38
          2 |          9        0.09        0.47
          3 |          9        0.09        0.56
          4 |          5        0.05        0.61
          5 |          9        0.09        0.70
          6 |          5        0.05        0.75
          7 |          8        0.08        0.83
          8 |         10        0.10        0.93
          9 |        439        4.39        5.32
          A |        231        2.31        7.63
          B |        368        3.68       11.31
          C |        328        3.28       14.59
          D |        279        2.79       17.38
          E |          8        0.08       17.46
          F |      1,516       15.16       32.62
          G |      1,744       17.44       50.06
          H |      1,292       12.92       62.98
          J |        230        2.30       65.28
          K |        144        1.44       66.72
          L |        109        1.09       67.81
          M |        390        3.90       71.71
          N |        862        8.62       80.33
          O |          1        0.01       80.34
          P |         36        0.36       80.70
          R |          3        0.03       80.73
          S |        258        2.58       83.31
          T |        998        9.98       93.29
          U |         22        0.22       93.51
          V |        218        2.18       95.69
          W |          6        0.06       95.75
          X |        172        1.72       97.47
          Y |        232        2.32       99.79
          Z |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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