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

 VIN Length |      Freq.     Percent        Cum.
------------+-----------------------------------
          5 |         23        0.23        0.23
          6 |        105        1.05        1.28
          7 |         89        0.89        2.17
          8 |        128        1.28        3.45
          9 |        379        3.79        7.24
         10 |        743        7.43       14.67
         11 |      2,152       21.52       36.19
         12 |        650        6.50       42.69
         13 |      3,781       37.81       80.50
         14 |         33        0.33       80.83
         17 |         17        0.17       81.00
         99 |      1,900       19.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016