Frequencies for first 10,000 rows of pct012n075 variable in sf12000860us29 dataset :

   72 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,856       98.56       98.56
          1 |        114        1.14       99.70
          2 |         16        0.16       99.86
          3 |          7        0.07       99.93
          4 |          4        0.04       99.97
          6 |          1        0.01       99.98
          7 |          1        0.01       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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