Year	%
1995	9.39
1996	11.46
1997	7.8
1998	6.01
1999	5.32
2000	4.64
2001	5.6
2002	6.66
2003	5.92
2004	6.09
2005	6.61
2006	5.95
2007	5.8
2008	5.71
2009	4.33
2010	4.38
2011	4.39
2012	4.27
2013	4.21
2014	4.1
2016	3.68
2018	3.33
2019	3.09
2020	2.92
2021	2.62