Frequencies for first 10,000 rows of pct012k173 variable in sf12000860us26 dataset :

   66 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,524       95.24       95.24
          1 |        394        3.94       99.18
          2 |         54        0.54       99.72
          3 |          7        0.07       99.79
          4 |          7        0.07       99.86
          5 |          3        0.03       99.89
          6 |          3        0.03       99.92
          8 |          1        0.01       99.93
         10 |          1        0.01       99.94
         11 |          1        0.01       99.95
         12 |          1        0.01       99.96
         18 |          1        0.01       99.97
         19 |          1        0.01       99.98
         20 |          1        0.01       99.99
         28 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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