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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,945       99.45       99.45
          1 |          3        0.03       99.48
          2 |          3        0.03       99.51
          3 |          1        0.01       99.52
          4 |          3        0.03       99.55
          5 |         13        0.13       99.68
          9 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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