Year	Percent change
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	15.465
1992	-7.076
1993	12.603
1994	-3.938
1995	-2.893
1996	-12.365
1997	-2.906
1998	-11.214
1999	33.676
2000	12.984
2001	-19.219
2002	2.954
2003	4.203
2004	7.816
2005	7.024
2006	8.064
2007	7.672
2008	1.819
2009	-11.346
2010	9.9
2011	4.229
2012	-0.422
2013	2.143
2014	3.647
2015	5.045
2016	3.013
2017	4.002
2018	3.52
2019	3.447
2020	3.604
2021	3.672
2022	3.754
2023	3.451
2024	3.433