Year	%
1992	13.96
1993	13.94
1994	12.81
1996	24.98
1997	19.89
1998	17.55
1999	16.67
2000	18.82
2001	19.18
2002	6.08
2003	5.73
2004	6.22
2005	3.47
2006	3.54
2007	3.04
2008	2.16
2009	1.82
2010	1.86
2011	1.64
2014	1.6
2015	2.07
2016	2.34
2017	2.66
2018	1.99
2019	1.64
2020	2.04
2021	2.04