Frequencies for first 10,000 rows of pct012n076 variable in sf12000860us29 dataset :

   73 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,861       98.61       98.61
          1 |        109        1.09       99.70
          2 |         21        0.21       99.91
          3 |          4        0.04       99.95
          4 |          2        0.02       99.97
          5 |          2        0.02       99.99
         15 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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