Frequencies for first 10,000 rows of pct012o177 variable in sf12000860us30 dataset :

   70 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,624       86.24       86.24
          1 |        922        9.22       95.46
          2 |        251        2.51       97.97
          3 |         87        0.87       98.84
          4 |         46        0.46       99.30
          5 |         24        0.24       99.54
          6 |         12        0.12       99.66
          7 |         13        0.13       99.79
          8 |         11        0.11       99.90
          9 |          1        0.01       99.91
         10 |          4        0.04       99.95
         11 |          2        0.02       99.97
         12 |          1        0.01       99.98
         15 |          1        0.01       99.99
         19 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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