Frequencies for first 10,000 rows of pct012c175 variable in sf12010860us22 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,195       91.95       91.95
          1 |        634        6.34       98.29
          2 |        106        1.06       99.35
          3 |         33        0.33       99.68
          4 |         11        0.11       99.79
          5 |          7        0.07       99.86
          6 |          3        0.03       99.89
          8 |          1        0.01       99.90
          9 |          1        0.01       99.91
         11 |          1        0.01       99.92
         14 |          1        0.01       99.93
         15 |          1        0.01       99.94
         18 |          1        0.01       99.95
         21 |          1        0.01       99.96
         25 |          1        0.01       99.97
         31 |          1        0.01       99.98
         34 |          1        0.01       99.99
         51 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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