Frequencies for first 10,000 rows of pct012m139 variable in sf12010880us32 dataset :

   32 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,831       98.31       98.31
          1 |        150        1.50       99.81
          2 |         17        0.17       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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