Frequencies for first 10,000 rows of pct012n060 variable in sf12000860us29 dataset :

   57 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,639       96.39       96.39
          1 |        271        2.71       99.10
          2 |         51        0.51       99.61
          3 |         15        0.15       99.76
          4 |         10        0.10       99.86
          5 |          3        0.03       99.89
          6 |          4        0.04       99.93
          7 |          2        0.02       99.95
          8 |          1        0.01       99.96
         10 |          1        0.01       99.97
         12 |          2        0.02       99.99
         18 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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