Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        180        1.80        1.80
          1 |        562        5.62        7.42
          2 |        406        4.06       11.48
          3 |        258        2.58       14.06
          4 |        195        1.95       16.01
          5 |        186        1.86       17.87
          6 |         97        0.97       18.84
          7 |        445        4.45       23.29
          8 |        118        1.18       24.47
          9 |        654        6.54       31.01
          A |        891        8.91       39.92
          B |      1,120       11.20       51.12
          C |        741        7.41       58.53
          D |        320        3.20       61.73
          E |        364        3.64       65.37
          F |        323        3.23       68.60
          G |        359        3.59       72.19
          H |        333        3.33       75.52
          J |        184        1.84       77.36
          K |         98        0.98       78.34
          L |        179        1.79       80.13
          M |        165        1.65       81.78
          N |        229        2.29       84.07
          P |        360        3.60       87.67
          Q |          3        0.03       87.70
          R |        396        3.96       91.66
          S |        253        2.53       94.19
          T |         55        0.55       94.74
          U |         88        0.88       95.62
          V |         94        0.94       96.56
          W |         65        0.65       97.21
          X |         50        0.50       97.71
          Y |        154        1.54       99.25
          Z |         75        0.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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