Year	%
1988	5.2
1989	5.29
1990	5.04
1991	5.78
1992	6.07
1993	6.17
1994	6.23
1995	9.67
1996	10.63
1997	8.37
1998	8.52
1999	9.62
2000	10.23
2001	13.22
2002	13.13
2003	12.55
2004	8.84
2005	7.64
2006	3.9
2007	3.75
2008	3.22
2009	4.19
2010	2.85
2011	3.12
2012	2.94
2013	1.31
2014	3.14
2015	3.95
2016	5.14
2017	4.94
2018	4.67
2019	25.15
2020	5.75
2021	4.27