Frequencies for first 10,000 rows of pct012c191 variable in sf12010860us22 dataset :

   84 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,720       97.20       97.20
          1 |        237        2.37       99.57
          2 |         29        0.29       99.86
          3 |          6        0.06       99.92
          4 |          3        0.03       99.95
          5 |          1        0.01       99.96
          6 |          1        0.01       99.97
          7 |          1        0.01       99.98
          8 |          1        0.01       99.99
         20 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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