Frequencies for first 10,000 rows of prov5955 variable in posclia2010 dataset :

 laboratory |
classificat |
      ion 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,900       19.00       19.00
         00 |      8,100       81.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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