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 |          4        0.04        0.05
          5 |         14        0.14        0.19
          6 |         38        0.38        0.57
          7 |         78        0.78        1.35
          8 |         30        0.30        1.65
          9 |        119        1.19        2.84
         10 |        404        4.04        6.88
         11 |        912        9.12       16.00
         12 |        216        2.16       18.16
         13 |      1,566       15.66       33.82
         14 |         13        0.13       33.95
         15 |         10        0.10       34.05
         16 |          5        0.05       34.10
         17 |      6,133       61.33       95.43
         99 |        457        4.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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