Frequencies for first 10,000 rows of pct012k191 variable in sf12000860us26 dataset :

   84 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,834       98.34       98.34
          1 |        143        1.43       99.77
          2 |         14        0.14       99.91
          3 |          2        0.02       99.93
          4 |          3        0.03       99.96
          6 |          2        0.02       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 , 17 Apr 2017