Year	Percent change
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	5.824
1990	2.121
1991	14.505
1992	4.343
1993	1.058
1994	-3.378
1995	9.164
1996	9.676
1997	3.696
1998	-5.93
1999	-3.471
2000	-2.42
2001	12.89
2002	11.888
2003	-3.503
2004	-0.339
2005	3.807
2006	-0.407
2007	1.3
2008	6.181
2009	2.684
2010	6.606
2011	4.523
2012	6.498
2013	-5.821
2014	1.762
2015	6.751
2016	-0.724
2017	3.658
2018	3.199
2019	11.44
2020	-4.171
2021	6.556
2022	6.83
2023	-0.312
2024	-0.884