Frequencies for first 10,000 rows of prov3560 variable in pos1998 dataset :

 laboratory |
  ownership |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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