Frequencies for first 10,000 rows of pct012m038 variable in sf12010880us32 dataset :

   35 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,846       98.46       98.46
          1 |        136        1.36       99.82
          2 |         12        0.12       99.94
          3 |          4        0.04       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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