Frequencies for first 10,000 rows of pct012e066 variable in sf12000860us20 dataset :

   63 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,921       99.21       99.21
          1 |         74        0.74       99.95
          2 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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