Year	Percent
2002	5.1853
2003	4.09221
2004	3.34262
2005	2.51001
2006	1.51764
2007	1.54142
2008	1.38365
2009	2.15807
2010	1.79953
2011	3.05767
2012	1.81559
2013	2.41549
2014	3.51668
2015	4.3863
2016	4.61178
2017	3.87478
2018	3.66013
2019	4.08879
2020	3.59386
2021	1.69937
2022	1.59722