Frequencies for first 10,000 rows of pct012m042 variable in sf12010860us32 dataset :

   39 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,794       97.94       97.94
          1 |        194        1.94       99.88
          2 |          9        0.09       99.97
          3 |          2        0.02       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017