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

Special Use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,921       99.21       99.21
          1 |          7        0.07       99.28
          3 |          5        0.05       99.33
          4 |          2        0.02       99.35
          5 |         18        0.18       99.53
          6 |          1        0.01       99.54
          7 |          5        0.05       99.59
          9 |         41        0.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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