Frequencies for first 10,000 rows of pct012n175 variable in sf12010880us33 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,716       97.16       97.16
          1 |        214        2.14       99.30
          2 |         36        0.36       99.66
          3 |         17        0.17       99.83
          4 |          4        0.04       99.87
          5 |          3        0.03       99.90
          6 |          1        0.01       99.91
          7 |          1        0.01       99.92
          8 |          2        0.02       99.94
          9 |          1        0.01       99.95
         10 |          1        0.01       99.96
         11 |          1        0.01       99.97
         12 |          1        0.01       99.98
         15 |          1        0.01       99.99
         23 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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