Frequencies for first 10,000 rows of pct012n070 variable in sf12010880us33 dataset :

   67 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,722       97.22       97.22
          1 |        224        2.24       99.46
          2 |         29        0.29       99.75
          3 |          8        0.08       99.83
          4 |          4        0.04       99.87
          5 |          2        0.02       99.89
          6 |          3        0.03       99.92
          7 |          2        0.02       99.94
          8 |          2        0.02       99.96
         10 |          1        0.01       99.97
         11 |          1        0.01       99.98
         15 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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