Frequencies for first 10,000 rows of pct012m151 variable in sf12010880us32 dataset :

   44 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,845       98.45       98.45
          1 |        143        1.43       99.88
          2 |         11        0.11       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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