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 |          9        0.09        0.10
          5 |         29        0.29        0.39
          6 |         53        0.53        0.92
          7 |        132        1.32        2.24
          8 |         49        0.49        2.73
          9 |        183        1.83        4.56
         10 |        549        5.49       10.05
         11 |      1,319       13.19       23.24
         12 |        353        3.53       26.77
         13 |      2,188       21.88       48.65
         14 |         37        0.37       49.02
         15 |         14        0.14       49.16
         16 |          9        0.09       49.25
         17 |      4,545       45.45       94.70
         99 |        530        5.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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