Table 4.

Case-mix groups (CMG)^* stratified by discharge year: percentage.

CMG	2002	2003	2004	2005	2006	2007	2008
0201	10.9%	10.5%	8.8%	7.9%	3.3%	3.5%	3.2%
0202	9.4%	9.5%	10.2%	10.9%	5.9%	5.2%	5.4%
0203	28.3%	27.8%	27.3%	25.9%	12.2%	11.9%	11.2%
0204	17.3%	17.8%	19.4%	20.4%	8.7%	8.2%	8.5%
0205	34.1%	34.3%	34.3%	35.0%	27.7%	28.6%	28.6%
0206					13.2%	14.2%	14.8%
0207					29.0%	28.5%	28.2%

Yearly summaries represent fiscal year periods (Oct 1 through Sep 30) from the Centers for Medicare and Medicaid Services.

^*The number of CMGs and criteria for determining them changed for fiscal year 2006.