Frequencies for first 10,000 rows of pct012o090 variable in sf12000860us30 dataset :

   87 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,688       96.88       96.88
          1 |        262        2.62       99.50
          2 |         33        0.33       99.83
          3 |         12        0.12       99.95
          4 |          4        0.04       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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