Frequencies for first 10,000 rows of pct012n091 variable in sf12010880us33 dataset :

   88 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,959       99.59       99.59
          1 |         36        0.36       99.95
          2 |          4        0.04       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017