Year	%
1995	8.34
1996	9.19
1997	9.1
1998	7.15
1999	4.51
2000	3.87
2001	3.71
2002	3.59
2003	3.83
2004	3.93
2005	3.65
2006	3.64
2007	3.65
2008	3.89
2009	3.06
2010	3.13
2011	3.49
2012	3.25
2013	3.36
2014	3.68
2016	4.34
2018	4.26
2019	4.07
2020	4.18
2021	4.05