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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        113        1.13        1.13
          1 |      1,213       12.13       13.26
          2 |        814        8.14       21.40
          3 |        823        8.23       29.63
          4 |        973        9.73       39.36
          5 |        121        1.21       40.57
          6 |        363        3.63       44.20
          7 |        276        2.76       46.96
          8 |        195        1.95       48.91
          9 |        389        3.89       52.80
          A |        886        8.86       61.66
          B |        168        1.68       63.34
          C |        499        4.99       68.33
          D |        244        2.44       70.77
          E |        147        1.47       72.24
          F |         31        0.31       72.55
          G |        227        2.27       74.82
          H |         83        0.83       75.65
          J |         23        0.23       75.88
          K |        132        1.32       77.20
          L |         83        0.83       78.03
          M |        542        5.42       83.45
          N |        266        2.66       86.11
          O |          1        0.01       86.12
          P |         91        0.91       87.03
          Q |          4        0.04       87.07
          R |         13        0.13       87.20
          S |        114        1.14       88.34
          T |        735        7.35       95.69
          U |        200        2.00       97.69
          V |         74        0.74       98.43
          W |         77        0.77       99.20
          X |         52        0.52       99.72
          Y |         20        0.20       99.92
          Z |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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