Frequencies for first 10,000 rows of prov4880 variable in posclia2009 dataset :

 shared lab |
  indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,340       43.40       43.40
          N |      5,532       55.32       98.72
          Y |        128        1.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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