Frequencies for first 10,000 rows of pct012m013 variable in sf12000860us28 dataset :

   10 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,841       98.41       98.41
          1 |        149        1.49       99.90
          2 |          9        0.09       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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