Frequencies for first 10,000 rows of pct012o178 variable in sf12000860us30 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,719       87.19       87.19
          1 |        876        8.76       95.95
          2 |        219        2.19       98.14
          3 |         86        0.86       99.00
          4 |         38        0.38       99.38
          5 |         28        0.28       99.66
          6 |         13        0.13       99.79
          7 |          8        0.08       99.87
          8 |          4        0.04       99.91
          9 |          6        0.06       99.97
         10 |          2        0.02       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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