Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

        vin |
character(7 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          5        0.05        0.05
          0 |        339        3.39        3.44
          1 |        716        7.16       10.60
          2 |      1,050       10.50       21.10
          3 |        922        9.22       30.32
          4 |        724        7.24       37.56
          5 |        452        4.52       42.08
          6 |        860        8.60       50.68
          7 |        388        3.88       54.56
          8 |        700        7.00       61.56
          9 |      1,033       10.33       71.89
          A |        454        4.54       76.43
          B |        201        2.01       78.44
          C |        292        2.92       81.36
          D |        272        2.72       84.08
          E |        415        4.15       88.23
          F |        251        2.51       90.74
          G |         74        0.74       91.48
          H |        154        1.54       93.02
          J |         78        0.78       93.80
          K |         80        0.80       94.60
          L |         64        0.64       95.24
          M |        129        1.29       96.53
          N |         22        0.22       96.75
          P |         77        0.77       97.52
          R |         19        0.19       97.71
          S |         59        0.59       98.30
          T |         27        0.27       98.57
          U |         15        0.15       98.72
          V |         30        0.30       99.02
          W |         55        0.55       99.57
          X |          6        0.06       99.63
          Y |         27        0.27       99.90
          Z |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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