Frequencies for vin_lngt variable in vehnit dataset :

 VIN LENGTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          5 |          1        0.08        0.08
          7 |          1        0.08        0.15
          9 |          3        0.23        0.38
         11 |         11        0.83        1.20
         12 |          2        0.15        1.36
         13 |         14        1.05        2.41
         17 |      1,296       97.59      100.00
------------+-----------------------------------
      Total |      1,328      100.00

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