Frequencies for first 10,000 rows of pct012o178 variable in sf12010860us34 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,595       85.95       85.95
          1 |      1,029       10.29       96.24
          2 |        252        2.52       98.76
          3 |         68        0.68       99.44
          4 |         34        0.34       99.78
          5 |          9        0.09       99.87
          6 |          7        0.07       99.94
          7 |          2        0.02       99.96
          8 |          2        0.02       99.98
          9 |          1        0.01       99.99
         18 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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