Year	%
1992	12.09
1993	8.86
1996	5.57
1997	4.76
1998	4.14
1999	3.4
2000	2.82
2001	3.35
2002	3.76
2003	4.12
2004	4.35
2005	3.46
2006	3.32
2007	3.41
2008	2.48
2009	2.15
2010	2.28
2011	2.65
2012	2.9
2013	1.79
2014	1.65
2015	1.57
2016	1.5
2017	1.56
2019	1.02
2020	0.91
2021	0.92