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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          0 |        179        1.79        1.80
          1 |        934        9.34       11.14
          2 |        528        5.28       16.42
          3 |        440        4.40       20.82
          4 |        209        2.09       22.91
          5 |        267        2.67       25.58
          6 |        373        3.73       29.31
          7 |        160        1.60       30.91
          8 |        131        1.31       32.22
          9 |      1,051       10.51       42.73
          A |        408        4.08       46.81
          B |        348        3.48       50.29
          C |        483        4.83       55.12
          D |        195        1.95       57.07
          E |        240        2.40       59.47
          F |        135        1.35       60.82
          G |        225        2.25       63.07
          H |        443        4.43       67.50
          I |          2        0.02       67.52
          J |        346        3.46       70.98
          K |        338        3.38       74.36
          L |        663        6.63       80.99
          M |        184        1.84       82.83
          N |        167        1.67       84.50
          O |          4        0.04       84.54
          P |        122        1.22       85.76
          Q |         61        0.61       86.37
          R |        317        3.17       89.54
          S |        204        2.04       91.58
          T |        155        1.55       93.13
          U |         60        0.60       93.73
          V |         71        0.71       94.44
          W |        123        1.23       95.67
          X |        123        1.23       96.90
          Y |        100        1.00       97.90
          Z |        210        2.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016