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

special use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,906       99.06       99.06
          1 |         13        0.13       99.19
          2 |         14        0.14       99.33
          3 |         31        0.31       99.64
          5 |         12        0.12       99.76
          6 |          3        0.03       99.79
          8 |          2        0.02       99.81
         99 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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