Frequencies for first 10,000 rows of prov4235 variable in pos2001 dataset :

  number of |
       labs |
   directly |
 affiliated |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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