Frequencies for first 10,000 rows of pct012n080 variable in sf12000860us29 dataset :

   77 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,881       98.81       98.81
          1 |        100        1.00       99.81
          2 |         10        0.10       99.91
          3 |          5        0.05       99.96
          4 |          1        0.01       99.97
          6 |          1        0.01       99.98
          7 |          1        0.01       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017