Year	Percent change
1980	-0.1
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	7.917
1991	6.505
1992	-4.988
1993	11.675
1994	19.112
1995	16.601
1996	10.854
1997	-10.009
1998	-2.046
1999	-5.215
2000	-4.456
2001	17.818
2002	15.793
2003	4.89
2004	1.938
2005	20.355
2006	-10.058
2007	16.327
2008	5.171
2009	-4.717
2010	-8
2011	23.913
2012	-0.877
2013	-7.965
2014	5.769
2015	-4.545
2016	6.667
2017	-1.786
2018	13.442
2019	12.978
2020	10.912
2021	11.306
2022	10.386
2023	8.497
2024	8.564