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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        231        2.31        2.31
          1 |      1,337       13.37       15.68
          2 |        989        9.89       25.57
          3 |        873        8.73       34.30
          4 |        918        9.18       43.48
          5 |        239        2.39       45.87
          6 |        549        5.49       51.36
          7 |        227        2.27       53.63
          8 |        292        2.92       56.55
          9 |        414        4.14       60.69
          A |        779        7.79       68.48
          B |        148        1.48       69.96
          C |        464        4.64       74.60
          D |        195        1.95       76.55
          E |        153        1.53       78.08
          F |         59        0.59       78.67
          G |         82        0.82       79.49
          H |        103        1.03       80.52
          J |         31        0.31       80.83
          K |         87        0.87       81.70
          L |        132        1.32       83.02
          M |        400        4.00       87.02
          N |        134        1.34       88.36
          O |          1        0.01       88.37
          P |         91        0.91       89.28
          Q |          2        0.02       89.30
          R |         10        0.10       89.40
          S |        118        1.18       90.58
          T |        597        5.97       96.55
          U |        153        1.53       98.08
          V |         52        0.52       98.60
          W |         56        0.56       99.16
          X |         26        0.26       99.42
          Y |         51        0.51       99.93
          Z |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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