Frequencies for first 10,000 rows of pct012o187 variable in sf12010860us34 dataset :

   80 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,013       90.13       90.13
          1 |        773        7.73       97.86
          2 |        153        1.53       99.39
          3 |         37        0.37       99.76
          4 |         14        0.14       99.90
          5 |          6        0.06       99.96
          6 |          1        0.01       99.97
          7 |          2        0.02       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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