Frequencies for first 10,000 rows of pct012o179 variable in sf12000860us30 dataset :

   72 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,624       86.24       86.24
          1 |        947        9.47       95.71
          2 |        233        2.33       98.04
          3 |        106        1.06       99.10
          4 |         39        0.39       99.49
          5 |         22        0.22       99.71
          6 |          5        0.05       99.76
          7 |         11        0.11       99.87
          8 |          7        0.07       99.94
          9 |          3        0.03       99.97
         10 |          1        0.01       99.98
         11 |          1        0.01       99.99
         13 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017