Frequencies for first 10,000 rows of pct012n198 variable in sf12000860us29 dataset :

   91 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,956       99.56       99.56
          1 |         36        0.36       99.92
          2 |          6        0.06       99.98
          3 |          1        0.01       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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