Year	Percent
1995	7.37581
1996	6.58493
1997	6.24164
1998	5.96505
1999	5.78349
2000	5.43525
2001	5.2027
2002	4.98711
2003	4.99978
2004	4.27541
2005	4.28422
2006	3.20124
2007	3.03735
2008	2.80725
2009	2.80495
2010	2.98833
2011	3.11375
2012	3.44107
2013	3.3826
2014	3.58413
2015	3.8647
2016	3.51534
2017	3.85639
2018	3.63541
2019	3.80859
2020	4.10023
2021	3.67679
2022	3.76452