Frequencies for first 10,000 rows of pct012h099 variable in sf12010880us27 dataset :

   96 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,729       97.29       97.29
          1 |        146        1.46       98.75
          2 |         39        0.39       99.14
          3 |         23        0.23       99.37
          4 |         23        0.23       99.60
          5 |         10        0.10       99.70
          6 |          9        0.09       99.79
          7 |          8        0.08       99.87
          8 |          4        0.04       99.91
          9 |          2        0.02       99.93
         10 |          2        0.02       99.95
         11 |          3        0.03       99.98
         12 |          1        0.01       99.99
         15 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017