Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

        vin |
character(3 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         41        0.41        0.41
          1 |      1,136       11.36       11.77
          2 |        424        4.24       16.01
          3 |        440        4.40       20.41
          4 |        803        8.03       28.44
          5 |         24        0.24       28.68
          6 |        195        1.95       30.63
          7 |        248        2.48       33.11
          8 |        278        2.78       35.89
          9 |        362        3.62       39.51
          A |        863        8.63       48.14
          B |        182        1.82       49.96
          C |        444        4.44       54.40
          D |        703        7.03       61.43
          E |        170        1.70       63.13
          F |         86        0.86       63.99
          G |        407        4.07       68.06
          H |        176        1.76       69.82
          J |         33        0.33       70.15
          K |        300        3.00       73.15
          L |         79        0.79       73.94
          M |        541        5.41       79.35
          N |        432        4.32       83.67
          P |        147        1.47       85.14
          R |         25        0.25       85.39
          S |         83        0.83       86.22
          T |        720        7.20       93.42
          U |        229        2.29       95.71
          V |         93        0.93       96.64
          W |        113        1.13       97.77
          X |        135        1.35       99.12
          Y |         46        0.46       99.58
          Z |         42        0.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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