Frequencies for first 10,000 rows of pct012c064 variable in sf12000860us18 dataset :

   61 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,259       92.59       92.59
          1 |        606        6.06       98.65
          2 |         94        0.94       99.59
          3 |         19        0.19       99.78
          4 |          7        0.07       99.85
          5 |          1        0.01       99.86
          6 |          4        0.04       99.90
          7 |          1        0.01       99.91
         10 |          1        0.01       99.92
         12 |          1        0.01       99.93
         13 |          1        0.01       99.94
         19 |          1        0.01       99.95
         28 |          2        0.02       99.97
         31 |          1        0.01       99.98
         35 |          1        0.01       99.99
         36 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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