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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        130        1.30        1.30
          1 |      1,251       12.51       13.81
          2 |        844        8.44       22.25
          3 |        852        8.52       30.77
          4 |        974        9.74       40.51
          5 |        111        1.11       41.62
          6 |        365        3.65       45.27
          7 |        230        2.30       47.57
          8 |        226        2.26       49.83
          9 |        420        4.20       54.03
          A |        874        8.74       62.77
          B |        130        1.30       64.07
          C |        485        4.85       68.92
          D |        257        2.57       71.49
          E |        156        1.56       73.05
          F |         46        0.46       73.51
          G |        201        2.01       75.52
          H |         87        0.87       76.39
          J |         28        0.28       76.67
          K |        156        1.56       78.23
          L |         80        0.80       79.03
          M |        515        5.15       84.18
          N |        226        2.26       86.44
          P |         96        0.96       87.40
          Q |          3        0.03       87.43
          R |         15        0.15       87.58
          S |        116        1.16       88.74
          T |        717        7.17       95.91
          U |        193        1.93       97.84
          V |         63        0.63       98.47
          W |         66        0.66       99.13
          X |         52        0.52       99.65
          Y |         25        0.25       99.90
          Z |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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