Table 1. Summary of Article Categories and Mean Citation Rates after a 5 Year Period by NIH Funding, PMC Status and Year.

	2006					2009
	No NIH funding	NIH Funded			2006 Total	No NIH funding	NIH Funded			2009 Total
		NIH/ No PMC	NIH/ PMC	NIH Total			NIH/ No PMC	NIH/ PMC	NIH Total
N	19,142	3241	337	3578	22,720	18,614	1263	3119	4382	22,996
Mean Cumulative Citation Rates (after 5 Years)	17.01	25.14	25.37	25.17	18.30	17.84	23.91	29.14	27.63	19.70
±SD	±31.2	±41.3	±28.7	±40.3	±32.9	±33.4	±41.3	±54.3	±50.9	±37.6