Frequencies for spec_use variable in vehnit dataset :

SPECIAL USE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,380       99.07       99.07
          1 |          1        0.07       99.14
          5 |         11        0.79       99.93
          6 |          1        0.07      100.00
------------+-----------------------------------
      Total |      1,393      100.00

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