Frequencies for first 10,000 rows of pct012g197 variable in sf12010880us26 dataset :

   90 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,543       95.43       95.43
          1 |        365        3.65       99.08
          2 |         57        0.57       99.65
          3 |         23        0.23       99.88
          4 |          7        0.07       99.95
          5 |          1        0.01       99.96
          6 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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