Frequencies for first 10,000 rows of prov5955 variable in posclia2006 dataset :

 laboratory |
classificat |
      ion 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,867       18.67       18.67
         00 |      8,133       81.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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