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

 VIN Length |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |         10        0.10        0.10
          5 |         53        0.53        0.63
          6 |         93        0.93        1.56
          7 |        149        1.49        3.05
          8 |        117        1.17        4.22
          9 |        408        4.08        8.30
         10 |        904        9.04       17.34
         11 |      2,117       21.17       38.51
         12 |        694        6.94       45.45
         13 |      3,475       34.75       80.20
         14 |         59        0.59       80.79
         15 |         15        0.15       80.94
         16 |         11        0.11       81.05
         17 |      1,162       11.62       92.67
         99 |        733        7.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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