Frequencies for first 10,000 rows of pct012n173 variable in sf12000860us29 dataset :

   66 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,776       97.76       97.76
          1 |        169        1.69       99.45
          2 |         32        0.32       99.77
          3 |         11        0.11       99.88
          4 |          4        0.04       99.92
          5 |          2        0.02       99.94
          7 |          1        0.01       99.95
         10 |          2        0.02       99.97
         14 |          1        0.01       99.98
         15 |          1        0.01       99.99
         23 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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