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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,919       99.19       99.19
          1 |          3        0.03       99.22
          2 |          2        0.02       99.24
          3 |          2        0.02       99.26
          4 |          4        0.04       99.30
          5 |         12        0.12       99.42
          6 |          7        0.07       99.49
          7 |          6        0.06       99.55
          9 |         45        0.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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