Frequencies for first 10,000 rows of prprvtr variable in namcs2003 dataset :

 percent of |
   pat care |
    revenue |
       from |
private ins |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,880       18.80       18.80
          2 |      3,373       33.73       52.53
          3 |      2,634       26.34       78.87
          4 |      1,443       14.43       93.30
          9 |        670        6.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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