Frequencies for first 10,000 rows of pct012e034 variable in sf12000860us20 dataset :

   31 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,720       97.20       97.20
          1 |        245        2.45       99.65
          2 |         27        0.27       99.92
          3 |          6        0.06       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017