Year	%
1989	19.01
1990	6.47
1991	7.01
1992	8.11
1993	7.27
1994	7.22
1995	6.49
1996	7.6
1997	6.96
1998	9.12
1999	5.28
2000	6.41
2001	4.37
2002	4.18
2003	3.93
2004	1.79
2005	1.52
2006	1.22
2007	1.13
2008	1.13
2009	1.48
2010	1.42
2011	1.37
2012	1.4
2013	2.99
2014	1.59
2015	2.02
2016	2.48
2017	2.88
2018	2.54
2019	2.65
2020	2.93
2021	2.31