Frequencies for first 10,000 rows of prov4970 variable in posclia2009 dataset :

 accredited |
y match ind |
       aabb |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,990       99.90       99.90
          Y |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016