Frequencies for first 10,000 rows of pct012c182 variable in sf12000860us18 dataset :

   75 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,583       95.83       95.83
          1 |        348        3.48       99.31
          2 |         40        0.40       99.71
          3 |         14        0.14       99.85
          4 |          6        0.06       99.91
          5 |          1        0.01       99.92
          9 |          1        0.01       99.93
         12 |          3        0.03       99.96
         13 |          1        0.01       99.97
         16 |          1        0.01       99.98
         17 |          1        0.01       99.99
         28 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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