Frequencies for prprvtr variable in namcsphys2005_2010 dataset :

 percent of |
    patient |
       care |
    revenue |
       from |
    private |
  insurance |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |        457        6.14        6.14
          1 |      2,220       29.80       35.94
          2 |      2,451       32.90       68.84
          3 |      1,535       20.61       89.45
          4 |        786       10.55      100.00
------------+-----------------------------------
      Total |      7,449      100.00

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