Frequencies for first 10,000 rows of pct012m014 variable in sf12000860us28 dataset :

   11 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,820       98.20       98.20
          1 |        171        1.71       99.91
          2 |          8        0.08       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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