Frequencies for first 10,000 rows of vin_1 variable in vehicle dataset :

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         76        0.76        0.76
          1 |      3,854       38.54       39.30
          2 |        472        4.72       44.02
          3 |        225        2.25       46.27
          4 |        195        1.95       48.22
          5 |         70        0.70       48.92
          6 |        125        1.25       50.17
          7 |         85        0.85       51.02
          8 |         91        0.91       51.93
          9 |        592        5.92       57.85
          A |         52        0.52       58.37
          B |         75        0.75       59.12
          C |        487        4.87       63.99
          D |         48        0.48       64.47
          E |         88        0.88       65.35
          F |        237        2.37       67.72
          G |         62        0.62       68.34
          H |        145        1.45       69.79
          I |          1        0.01       69.80
          J |      1,997       19.97       89.77
          K |        167        1.67       91.44
          L |         30        0.30       91.74
          M |         18        0.18       91.92
          N |         29        0.29       92.21
          P |         69        0.69       92.90
          R |        157        1.57       94.47
          S |        140        1.40       95.87
          T |        134        1.34       97.21
          U |         14        0.14       97.35
          V |         53        0.53       97.88
          W |        159        1.59       99.47
          X |         16        0.16       99.63
          Y |         29        0.29       99.92
          Z |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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