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 |          4        0.04        0.05
          6 |         10        0.10        0.15
          7 |         17        0.17        0.32
          8 |         15        0.15        0.47
          9 |         39        0.39        0.86
         10 |         58        0.58        1.44
         11 |        148        1.48        2.92
         12 |         58        0.58        3.50
         13 |        251        2.51        6.01
         14 |          9        0.09        6.10
         15 |          3        0.03        6.13
         16 |          7        0.07        6.20
         17 |      9,380       93.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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