Frequencies for first 10,000 rows of vin_10 variable in vehicle dataset :

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         45        0.45        0.45
          0 |         35        0.35        0.80
          1 |        716        7.16        7.96
          2 |        761        7.61       15.57
          3 |        642        6.42       21.99
          4 |         83        0.83       22.82
          5 |         24        0.24       23.06
          6 |         24        0.24       23.30
          7 |         27        0.27       23.57
          8 |         33        0.33       23.90
          9 |        426        4.26       28.16
          B |         39        0.39       28.55
          C |         47        0.47       29.02
          D |         86        0.86       29.88
          E |        106        1.06       30.94
          F |        148        1.48       32.42
          G |        189        1.89       34.31
          H |        217        2.17       36.48
          J |        258        2.58       39.06
          K |        347        3.47       42.53
          L |        343        3.43       45.96
          M |        373        3.73       49.69
          N |        392        3.92       53.61
          P |        440        4.40       58.01
          R |        467        4.67       62.68
          S |        621        6.21       68.89
          T |        537        5.37       74.26
          V |        572        5.72       79.98
          W |        630        6.30       86.28
          X |        648        6.48       92.76
          Y |        722        7.22       99.98
          Z |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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