Frequencies for first 10,000 rows of pct012n175 variable in sf12000860us29 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,788       97.88       97.88
          1 |        165        1.65       99.53
          2 |         27        0.27       99.80
          3 |          7        0.07       99.87
          4 |          4        0.04       99.91
          5 |          3        0.03       99.94
          6 |          2        0.02       99.96
          7 |          1        0.01       99.97
          9 |          1        0.01       99.98
         17 |          1        0.01       99.99
         18 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017