Frequencies for vin_lngt variable in vehnit dataset :

 VIN LENGTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          5 |          1        0.09        0.09
          6 |          2        0.18        0.27
          8 |          1        0.09        0.36
         11 |          4        0.36        0.72
         12 |          4        0.36        1.08
         13 |          6        0.54        1.61
         16 |          2        0.18        1.79
         17 |      1,096       98.21      100.00
------------+-----------------------------------
      Total |      1,116      100.00

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