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

 VIN Length |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |          1        0.01        0.01
          5 |         10        0.10        0.11
          6 |         30        0.30        0.41
          7 |        121        1.21        1.62
          8 |         90        0.90        2.52
          9 |        401        4.01        6.53
         10 |        470        4.70       11.23
         11 |      1,674       16.74       27.97
         12 |        516        5.16       33.13
         13 |      2,508       25.08       58.21
         14 |         27        0.27       58.48
         17 |          7        0.07       58.55
         99 |      4,145       41.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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