Frequencies for first 10,000 rows of pct012n197 variable in sf12010880us33 dataset :

   90 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,933       99.33       99.33
          1 |         59        0.59       99.92
          2 |          6        0.06       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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