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

 VIN Length |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |          4        0.04        0.04
          5 |         37        0.37        0.41
          6 |        113        1.13        1.54
          7 |         77        0.77        2.31
          8 |        140        1.40        3.71
          9 |        336        3.36        7.07
         10 |        723        7.23       14.30
         11 |      2,072       20.72       35.02
         12 |        616        6.16       41.18
         13 |      3,417       34.17       75.35
         14 |         24        0.24       75.59
         17 |         14        0.14       75.73
         99 |      2,427       24.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016