Frequencies for first 10,000 rows of pct012m159 variable in sf12010860us32 dataset :

   52 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,818       98.18       98.18
          1 |        165        1.65       99.83
          2 |         12        0.12       99.95
          3 |          4        0.04       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017