Frequencies for first 10,000 rows of vin_12 variable in vehicle dataset :

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         76        0.76        0.76
          0 |      1,704       17.04       17.80
          1 |      2,086       20.86       38.66
          2 |      1,186       11.86       50.52
          3 |        702        7.02       57.54
          4 |        460        4.60       62.14
          5 |        777        7.77       69.91
          6 |        537        5.37       75.28
          7 |        364        3.64       78.92
          8 |        233        2.33       81.25
          9 |        438        4.38       85.63
          A |        522        5.22       90.85
          B |        366        3.66       94.51
          C |        138        1.38       95.89
          D |         77        0.77       96.66
          E |         22        0.22       96.88
          F |         19        0.19       97.07
          G |         11        0.11       97.18
          H |         15        0.15       97.33
          J |         63        0.63       97.96
          K |         18        0.18       98.14
          L |         12        0.12       98.26
          M |         42        0.42       98.68
          N |         25        0.25       98.93
          P |          5        0.05       98.98
          R |          2        0.02       99.00
          S |          6        0.06       99.06
          T |          5        0.05       99.11
          U |         26        0.26       99.37
          V |         18        0.18       99.55
          W |         17        0.17       99.72
          X |         12        0.12       99.84
          Y |          9        0.09       99.93
          Z |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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