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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,931       99.31       99.31
          1 |         12        0.12       99.43
          3 |          2        0.02       99.45
          4 |          1        0.01       99.46
          5 |         17        0.17       99.63
          6 |          2        0.02       99.65
          7 |          3        0.03       99.68
          9 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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