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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,942       99.42       99.42
          1 |          7        0.07       99.49
          2 |          1        0.01       99.50
          3 |          2        0.02       99.52
          4 |          1        0.01       99.53
          5 |         18        0.18       99.71
          9 |         29        0.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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