Year	%
1995	22.36
1998	17.59
1999	19.98
2000	19.98
2001	20.1
2002	28.22
2003	17.66
2004	12.13
2005	10.67
2006	11.56
2007	9.83
2008	9.35
2009	8.66
2010	10.9
2011	9.97
2012	9.99
2013	9.55
2014	8.94
2015	8.43
2016	7.64
2017	6.71
2018	6.59
2019	6.07