Frequencies for first 10,000 rows of pct012o071 variable in sf12000860us30 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,799       87.99       87.99
          1 |        848        8.48       96.47
          2 |        206        2.06       98.53
          3 |         72        0.72       99.25
          4 |         35        0.35       99.60
          5 |         14        0.14       99.74
          6 |         10        0.10       99.84
          7 |          8        0.08       99.92
          8 |          3        0.03       99.95
          9 |          2        0.02       99.97
         10 |          2        0.02       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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