Frequencies for first 10,000 rows of pct012l094 variable in sf12000860us27 dataset :

   91 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,839       98.39       98.39
          1 |        121        1.21       99.60
          2 |         26        0.26       99.86
          3 |          7        0.07       99.93
          4 |          3        0.03       99.96
          5 |          3        0.03       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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