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

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         74        0.74        0.74
          0 |      1,744       17.44       18.18
          1 |      2,148       21.48       39.66
          2 |      1,201       12.01       51.67
          3 |        733        7.33       59.00
          4 |        438        4.38       63.38
          5 |        724        7.24       70.62
          6 |        566        5.66       76.28
          7 |        331        3.31       79.59
          8 |        248        2.48       82.07
          9 |        383        3.83       85.90
          A |        504        5.04       90.94
          B |        321        3.21       94.15
          C |        168        1.68       95.83
          D |         85        0.85       96.68
          E |         20        0.20       96.88
          F |         26        0.26       97.14
          G |         11        0.11       97.25
          H |         15        0.15       97.40
          J |         57        0.57       97.97
          K |          3        0.03       98.00
          L |         13        0.13       98.13
          M |         48        0.48       98.61
          N |         26        0.26       98.87
          P |          5        0.05       98.92
          R |          6        0.06       98.98
          S |          4        0.04       99.02
          T |          7        0.07       99.09
          U |         20        0.20       99.29
          V |         16        0.16       99.45
          W |         18        0.18       99.63
          X |         14        0.14       99.77
          Y |         12        0.12       99.89
          Z |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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