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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         47        0.47        0.47
          1 |        214        2.14        2.61
          2 |        105        1.05        3.66
          3 |         69        0.69        4.35
          4 |         26        0.26        4.61
          5 |         31        0.31        4.92
          6 |         31        0.31        5.23
          7 |         24        0.24        5.47
          8 |         47        0.47        5.94
          9 |        397        3.97        9.91
          A |        225        2.25       12.16
          B |        448        4.48       16.64
          C |        280        2.80       19.44
          D |         85        0.85       20.29
          E |         88        0.88       21.17
          F |      1,611       16.11       37.28
          G |      2,304       23.04       60.32
          H |        815        8.15       68.47
          I |          1        0.01       68.48
          J |        168        1.68       70.16
          K |        135        1.35       71.51
          L |        150        1.50       73.01
          M |        492        4.92       77.93
          N |        597        5.97       83.90
          O |          2        0.02       83.92
          P |        156        1.56       85.48
          Q |         18        0.18       85.66
          R |         50        0.50       86.16
          S |        152        1.52       87.68
          T |        723        7.23       94.91
          U |         14        0.14       95.05
          V |        118        1.18       96.23
          W |         49        0.49       96.72
          X |        167        1.67       98.39
          Y |        109        1.09       99.48
          Z |         52        0.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016