Frequencies for first 10,000 rows of pct012i099 variable in sf12000860us24 dataset :

   96 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,880       78.80       78.80
          1 |      1,327       13.27       92.07
          2 |        448        4.48       96.55
          3 |        177        1.77       98.32
          4 |         67        0.67       98.99
          5 |         46        0.46       99.45
          6 |         23        0.23       99.68
          7 |         12        0.12       99.80
          8 |          9        0.09       99.89
          9 |          5        0.05       99.94
         10 |          3        0.03       99.97
         11 |          1        0.01       99.98
         12 |          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