Frequencies for first 10,000 rows of pct012m129 variable in sf12010880us32 dataset :

   22 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,794       97.94       97.94
          1 |        177        1.77       99.71
          2 |         26        0.26       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017