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

 VIN LENGTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |          2        0.02        0.02
          5 |          7        0.07        0.09
          6 |         13        0.13        0.22
          7 |         27        0.27        0.49
          8 |         11        0.11        0.60
          9 |         38        0.38        0.98
         10 |         71        0.71        1.69
         11 |        192        1.92        3.61
         12 |         63        0.63        4.24
         13 |        350        3.50        7.74
         14 |          5        0.05        7.79
         15 |          6        0.06        7.85
         16 |          4        0.04        7.89
         17 |      9,211       92.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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