Frequencies for first 10,000 rows of pct012100 variable in sf12000860us14 dataset :

   97 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,020       80.20       80.20
          1 |      1,270       12.70       92.90
          2 |        417        4.17       97.07
          3 |        139        1.39       98.46
          4 |         70        0.70       99.16
          5 |         40        0.40       99.56
          6 |         16        0.16       99.72
          7 |         13        0.13       99.85
          8 |          6        0.06       99.91
          9 |          5        0.05       99.96
         10 |          1        0.01       99.97
         12 |          1        0.01       99.98
         13 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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