Frequencies for first 10,000 rows of pct012m120 variable in sf12010880us32 dataset :

   13 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,896       98.96       98.96
          1 |         97        0.97       99.93
          2 |          6        0.06       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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