Frequencies for first 10,000 rows of pct012e163 variable in sf12000860us20 dataset :

   56 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,888       98.88       98.88
          1 |        107        1.07       99.95
          2 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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