Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

        vin |
character(4 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         50        0.50        0.50
          1 |        379        3.79        4.29
          2 |         24        0.24        4.53
          3 |         21        0.21        4.74
          4 |         48        0.48        5.22
          5 |         57        0.57        5.79
          6 |         19        0.19        5.98
          7 |         35        0.35        6.33
          8 |          9        0.09        6.42
          9 |        351        3.51        9.93
          A |        583        5.83       15.76
          B |        783        7.83       23.59
          C |        842        8.42       32.01
          D |        615        6.15       38.16
          E |        945        9.45       47.61
          F |        629        6.29       53.90
          G |        558        5.58       59.48
          H |        594        5.94       65.42
          J |        343        3.43       68.85
          K |        268        2.68       71.53
          L |        153        1.53       73.06
          M |        111        1.11       74.17
          N |        255        2.55       76.72
          P |        206        2.06       78.78
          R |        510        5.10       83.88
          S |        337        3.37       87.25
          T |        109        1.09       88.34
          U |         76        0.76       89.10
          V |        169        1.69       90.79
          W |        278        2.78       93.57
          X |         28        0.28       93.85
          Y |        233        2.33       96.18
          Z |        382        3.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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