Frequencies for first 10,000 rows of pct012d101 variable in sf12000860us19 dataset :

   98 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,965       99.65       99.65
          1 |         31        0.31       99.96
          2 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017