Frequencies for first 10,000 rows of pct012m150 variable in sf12010880us32 dataset :

   43 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,865       98.65       98.65
          1 |        132        1.32       99.97
          2 |          2        0.02       99.99
          5 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017