Year	IF	5-yr IF
2019	0.629	0.806
2018	0.667	0.873
2017	0.708	0.749
2016	0.670	0.895
2015	0.622	0.837
2014	0.577	0.846
2013	0.691	0.701
2012	0.606	—
2011	0.547
2010	0.490

Source: Journal Citation Reports