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

 VIN Length |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |          6        0.06        0.06
          5 |         41        0.41        0.47
          6 |         87        0.87        1.34
          7 |        145        1.45        2.79
          8 |         67        0.67        3.46
          9 |        274        2.74        6.20
         10 |        673        6.73       12.93
         11 |      1,567       15.67       28.60
         12 |        410        4.10       32.70
         13 |      2,573       25.73       58.43
         14 |         45        0.45       58.88
         15 |         20        0.20       59.08
         16 |          9        0.09       59.17
         17 |      3,383       33.83       93.00
         99 |        700        7.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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