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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,957       99.57       99.57
          1 |          4        0.04       99.61
          2 |          1        0.01       99.62
          3 |          1        0.01       99.63
          4 |          2        0.02       99.65
          5 |         20        0.20       99.85
          9 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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