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 |          2        0.02        0.03
          6 |          6        0.06        0.09
          7 |         12        0.12        0.21
          8 |         11        0.11        0.32
          9 |         23        0.23        0.55
         10 |         32        0.32        0.87
         11 |        107        1.07        1.94
         12 |         30        0.30        2.24
         13 |        180        1.80        4.04
         14 |          8        0.08        4.12
         15 |          2        0.02        4.14
         16 |         10        0.10        4.24
         17 |      9,566       95.66       99.90
         99 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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