Frequencies for first 10,000 rows of pct012f198 variable in sf12000860us21 dataset :

   91 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,761       97.61       97.61
          1 |        161        1.61       99.22
          2 |         45        0.45       99.67
          3 |         14        0.14       99.81
          4 |          7        0.07       99.88
          5 |          7        0.07       99.95
          6 |          2        0.02       99.97
          7 |          1        0.01       99.98
          8 |          1        0.01       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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