Frequencies for first 10,000 rows of prov5990 variable in posclia2008 dataset :

 laboratory |
classificat |
      ion 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,305       43.05       43.05
         00 |      5,695       56.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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