Frequencies for first 10,000 rows of pct012l097 variable in sf12000860us27 dataset :

   94 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,910       99.10       99.10
          1 |         81        0.81       99.91
          2 |          5        0.05       99.96
          3 |          2        0.02       99.98
          4 |          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