Frequencies for first 10,000 rows of pct012g090 variable in sf12000860us22 dataset :

   87 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,593       95.93       95.93
          1 |        313        3.13       99.06
          2 |         62        0.62       99.68
          3 |         22        0.22       99.90
          4 |          6        0.06       99.96
          5 |          3        0.03       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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