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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         12        0.12        0.12
          1 |         42        0.42        0.54
          2 |         15        0.15        0.69
          3 |         14        0.14        0.83
          4 |          8        0.08        0.91
          5 |          7        0.07        0.98
          6 |         10        0.10        1.08
          7 |         12        0.12        1.20
          8 |         12        0.12        1.32
          9 |        473        4.73        6.05
          A |        195        1.95        8.00
          B |        544        5.44       13.44
          C |        178        1.78       15.22
          D |        173        1.73       16.95
          E |         20        0.20       17.15
          F |      1,859       18.59       35.74
          G |      2,216       22.16       57.90
          H |      1,143       11.43       69.33
          J |        230        2.30       71.63
          K |         83        0.83       72.46
          L |        112        1.12       73.58
          M |        346        3.46       77.04
          N |        698        6.98       84.02
          P |         77        0.77       84.79
          R |         12        0.12       84.91
          S |        234        2.34       87.25
          T |        713        7.13       94.38
          U |          8        0.08       94.46
          V |        165        1.65       96.11
          W |         13        0.13       96.24
          X |        168        1.68       97.92
          Y |        178        1.78       99.70
          Z |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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