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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,925       99.25       99.25
          1 |         11        0.11       99.36
          2 |          1        0.01       99.37
          3 |          1        0.01       99.38
          4 |          1        0.01       99.39
          5 |         15        0.15       99.54
          6 |          2        0.02       99.56
          7 |          3        0.03       99.59
          8 |          1        0.01       99.60
         99 |         40        0.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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