Frequencies for first 10,000 rows of prmanr variable in namcs2005 dataset :

 percent of |
    patient |
       care |
    revenue |
       from |
    managed |
       care |
  contracts |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,840       18.40       18.40
          2 |      2,298       22.98       41.38
          3 |      1,952       19.52       60.90
          4 |      2,215       22.15       83.05
          9 |      1,695       16.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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