Frequencies for first 10,000 rows of pct012k076 variable in sf12010860us30 dataset :

   73 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,605       96.05       96.05
          1 |        326        3.26       99.31
          2 |         46        0.46       99.77
          3 |          7        0.07       99.84
          4 |          6        0.06       99.90
          5 |          3        0.03       99.93
          6 |          2        0.02       99.95
          8 |          1        0.01       99.96
         11 |          1        0.01       99.97
         13 |          1        0.01       99.98
         18 |          1        0.01       99.99
         21 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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