Frequencies for first 10,000 rows of pct012c197 variable in sf12000860us18 dataset :

   90 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,908       99.08       99.08
          1 |         85        0.85       99.93
          2 |          5        0.05       99.98
          3 |          1        0.01       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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