Year	Percent change
1980	12.5
1981	0
1982	0
1983	0
1984	0
1985	0
1990	4.75
1991	-8.039
1992	-0.719
1993	-12.255
1994	25.674
1995	32.069
1996	2.163
1997	1.313
1998	-3.281
1999	-7.015
2000	6.759
2001	9.053
2002	-1.096
2003	1.519
2004	6.428
2005	17.891
2006	12.415
2007	17.48
2008	1.546
2009	18.622
2010	-5
2011	11.579
2012	-0.943
2013	1.905
2014	6.542
2015	0
2016	-11.404
2017	7.921
2018	0.057
2019	10.935
2020	11.223
2021	9.778
2022	8.946
2023	7.664
2024	7.3