Frequencies for first 10,000 rows of pct012e059 variable in sf12000860us20 dataset :

   56 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,899       98.99       98.99
          1 |         99        0.99       99.98
          2 |          1        0.01       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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