Frequencies for first 10,000 rows of pct012k185 variable in sf12010860us30 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,688       96.88       96.88
          1 |        270        2.70       99.58
          2 |         24        0.24       99.82
          3 |          8        0.08       99.90
          4 |          2        0.02       99.92
          7 |          1        0.01       99.93
          8 |          2        0.02       99.95
          9 |          2        0.02       99.97
         10 |          1        0.01       99.98
         15 |          1        0.01       99.99
         22 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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