Frequencies for first 10,000 rows of pct012o075 variable in sf12000860us30 dataset :

   72 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,926       89.26       89.26
          1 |        777        7.77       97.03
          2 |        190        1.90       98.93
          3 |         53        0.53       99.46
          4 |         22        0.22       99.68
          5 |         18        0.18       99.86
          6 |          7        0.07       99.93
          7 |          4        0.04       99.97
         10 |          1        0.01       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 , 17 Apr 2017