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

 VIN Length |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |          3        0.03        0.03
          5 |         29        0.29        0.32
          6 |         75        0.75        1.07
          7 |        104        1.04        2.11
          8 |         49        0.49        2.60
          9 |        223        2.23        4.83
         10 |        599        5.99       10.82
         11 |      1,504       15.04       25.86
         12 |        434        4.34       30.20
         13 |      2,334       23.34       53.54
         14 |         46        0.46       54.00
         15 |         18        0.18       54.18
         16 |          8        0.08       54.26
         17 |      4,060       40.60       94.86
         99 |        514        5.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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