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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,882       98.82       98.82
          1 |         10        0.10       98.92
          3 |          1        0.01       98.93
          4 |          6        0.06       98.99
          5 |         26        0.26       99.25
          6 |          1        0.01       99.26
          7 |          4        0.04       99.30
          9 |         70        0.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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