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

        vin |
character(7 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          7        0.07        0.07
          0 |        347        3.47        3.54
          1 |        760        7.60       11.14
          2 |      1,152       11.52       22.66
          3 |        933        9.33       31.99
          4 |        824        8.24       40.23
          5 |        513        5.13       45.36
          6 |        879        8.79       54.15
          7 |        387        3.87       58.02
          8 |        790        7.90       65.92
          9 |        942        9.42       75.34
          A |        404        4.04       79.38
          B |        193        1.93       81.31
          C |        251        2.51       83.82
          D |        192        1.92       85.74
          E |        377        3.77       89.51
          F |        185        1.85       91.36
          G |         82        0.82       92.18
          H |        128        1.28       93.46
          J |         68        0.68       94.14
          K |         59        0.59       94.73
          L |         63        0.63       95.36
          M |        108        1.08       96.44
          N |         20        0.20       96.64
          P |         78        0.78       97.42
          Q |          1        0.01       97.43
          R |         20        0.20       97.63
          S |         50        0.50       98.13
          T |         27        0.27       98.40
          U |         11        0.11       98.51
          V |         51        0.51       99.02
          W |         50        0.50       99.52
          X |          4        0.04       99.56
          Y |         30        0.30       99.86
          Z |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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