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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         22        0.22        0.22
          1 |         16        0.16        0.38
          2 |         14        0.14        0.52
          3 |          7        0.07        0.59
          4 |          3        0.03        0.62
          5 |         13        0.13        0.75
          6 |          3        0.03        0.78
          7 |          8        0.08        0.86
          8 |         10        0.10        0.96
          9 |        314        3.14        4.10
          A |        208        2.08        6.18
          B |        459        4.59       10.77
          C |        184        1.84       12.61
          D |        273        2.73       15.34
          E |         16        0.16       15.50
          F |      1,757       17.57       33.07
          G |      2,048       20.48       53.55
          H |      1,195       11.95       65.50
          J |        248        2.48       67.98
          K |        116        1.16       69.14
          L |        116        1.16       70.30
          M |        342        3.42       73.72
          N |        766        7.66       81.38
          O |          1        0.01       81.39
          P |         55        0.55       81.94
          Q |          1        0.01       81.95
          R |          8        0.08       82.03
          S |        263        2.63       84.66
          T |        929        9.29       93.95
          U |         19        0.19       94.14
          V |        180        1.80       95.94
          W |         10        0.10       96.04
          X |        127        1.27       97.31
          Y |        223        2.23       99.54
          Z |         46        0.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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