Frequencies for first 10,000 rows of pct012c168 variable in sf12010860us22 dataset :

   61 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,767       87.67       87.67
          1 |        921        9.21       96.88
          2 |        193        1.93       98.81
          3 |         51        0.51       99.32
          4 |         30        0.30       99.62
          5 |         16        0.16       99.78
          6 |          4        0.04       99.82
          7 |          2        0.02       99.84
          8 |          3        0.03       99.87
          9 |          1        0.01       99.88
         10 |          2        0.02       99.90
         11 |          1        0.01       99.91
         17 |          1        0.01       99.92
         18 |          1        0.01       99.93
         24 |          1        0.01       99.94
         25 |          1        0.01       99.95
         33 |          1        0.01       99.96
         36 |          1        0.01       99.97
         53 |          1        0.01       99.98
         57 |          1        0.01       99.99
         64 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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