Year	%
1995	10.5
1996	8.65
1997	6.75
1998	6.49
1999	6.46
2000	6.05
2001	7.92
2002	7.18
2003	5.26
2004	5.84
2005	6.12
2006	4.48
2007	5.12
2008	4.43
2009	3.64
2010	3
2011	2.77
2012	2.47
2013	2.67
2014	2.42
2016	2.59
2018	4.15
2019	3.81
2020	3.71
2021	3.71