Frequencies for first 10,000 rows of pct012o078 variable in sf12000860us30 dataset :

   75 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,068       90.68       90.68
          1 |        705        7.05       97.73
          2 |        148        1.48       99.21
          3 |         41        0.41       99.62
          4 |         24        0.24       99.86
          5 |          7        0.07       99.93
          6 |          3        0.03       99.96
          7 |          1        0.01       99.97
          8 |          2        0.02       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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