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

special use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,949       99.49       99.49
          1 |          8        0.08       99.57
          2 |          3        0.03       99.60
          3 |          1        0.01       99.61
          5 |         19        0.19       99.80
          6 |          4        0.04       99.84
          7 |          2        0.02       99.86
          8 |          2        0.02       99.88
         99 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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