Frequencies for first 10,000 rows of pct012e072 variable in sf12000860us20 dataset :

   69 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,948       99.48       99.48
          1 |         49        0.49       99.97
          2 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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