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

 VIN Length |      Freq.     Percent        Cum.
------------+-----------------------------------
          3 |          1        0.01        0.01
          4 |          6        0.06        0.07
          5 |         30        0.30        0.37
          6 |         99        0.99        1.36
          7 |        160        1.60        2.96
          8 |         89        0.89        3.85
          9 |        304        3.04        6.89
         10 |        759        7.59       14.48
         11 |      1,765       17.65       32.13
         12 |        575        5.75       37.88
         13 |      2,856       28.56       66.44
         14 |         59        0.59       67.03
         15 |         24        0.24       67.27
         16 |         14        0.14       67.41
         17 |      2,536       25.36       92.77
         99 |        723        7.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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