Frequencies for first 10,000 rows of pct012c071 variable in sf12010860us22 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,199       91.99       91.99
          1 |        641        6.41       98.40
          2 |        115        1.15       99.55
          3 |         19        0.19       99.74
          4 |         11        0.11       99.85
          6 |          3        0.03       99.88
          7 |          2        0.02       99.90
          8 |          2        0.02       99.92
          9 |          1        0.01       99.93
         11 |          2        0.02       99.95
         16 |          2        0.02       99.97
         24 |          1        0.01       99.98
         31 |          1        0.01       99.99
         35 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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