Frequencies for first 10,000 rows of pct012f093 variable in sf12000860us21 dataset :

   90 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,830       98.30       98.30
          1 |        117        1.17       99.47
          2 |         33        0.33       99.80
          3 |         15        0.15       99.95
          4 |          1        0.01       99.96
          5 |          3        0.03       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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