Frequencies for first 10,000 rows of prmanr variable in namcs2004 dataset :

 percent of |
   pat care |
    revenue |
       from |
    managed |
       care |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,413       24.13       24.13
          2 |      3,037       30.37       54.50
          3 |      1,316       13.16       67.66
          4 |      1,259       12.59       80.25
          9 |      1,975       19.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016