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

special use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,950       99.50       99.50
          1 |          9        0.09       99.59
          2 |          1        0.01       99.60
          3 |          1        0.01       99.61
          5 |         20        0.20       99.81
          6 |          3        0.03       99.84
          7 |          8        0.08       99.92
         99 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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