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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,951       99.51       99.51
          1 |         13        0.13       99.64
          2 |          3        0.03       99.67
          3 |          4        0.04       99.71
          4 |          3        0.03       99.74
          5 |         21        0.21       99.95
          6 |          1        0.01       99.96
          9 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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