Frequencies for first 10,000 rows of pct012l200 variable in sf12000860us27 dataset :

   93 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,831       98.31       98.31
          1 |        132        1.32       99.63
          2 |         24        0.24       99.87
          3 |          7        0.07       99.94
          5 |          2        0.02       99.96
          6 |          1        0.01       99.97
          7 |          1        0.01       99.98
          9 |          1        0.01       99.99
         21 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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