Frequencies for first 10,000 rows of pct012n071 variable in sf12000860us29 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,826       98.26       98.26
          1 |        134        1.34       99.60
          2 |         22        0.22       99.82
          3 |          9        0.09       99.91
          4 |          1        0.01       99.92
          5 |          2        0.02       99.94
          6 |          2        0.02       99.96
          7 |          2        0.02       99.98
         12 |          1        0.01       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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