Year	Percent
1995	13.8219
1996	13.13666
1997	11.21533
1998	13.29216
1999	15.64359
2000	16.09149
2001	12.32736
2002	9.1357
2003	10.9416
2004	10.29095
2005	8.70438
2006	7.37309
2007	7.66125
2008	6.41455
2009	8.44726
2010	5.07205
2011	5.96374
2012	6.88177
2013	6.32763
2014	5.96183
2015	4.12296
2016	3.563
2017	2.64873
2018	1.65652
2019	1.01753
2020	1.05833
2021	0.42115