Frequencies for first 10,000 rows of pct012e160 variable in sf12000860us20 dataset :

   53 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,854       98.54       98.54
          1 |        138        1.38       99.92
          2 |          7        0.07       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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