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

 percent of patient care revenue |
                   from medicare |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
Less than or equal to 25 percent |      4,419       44.19       44.19
                   26-50 percent |      3,139       31.39       75.58
                   51-75 percent |      1,452       14.52       90.10
            More than 75 percent |        307        3.07       93.17
                           Blank |        683        6.83      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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