Year	Percent change
1980	-3
1981	8
1982	-12.9
1983	4.6
1984	12.5
1985	-5.9
1986	-33.8
1987	54.3
1988	7
1989	2.7
1990	14.6
1991	0.186
1992	8.359
1993	-8.275
1994	8.236
1995	12.24
1996	10.698
1997	6.02
1998	2.536
1999	1.426
2000	1.624
2001	-2.578
2002	23.562
2003	-1.931
2004	13.537
2005	28.148
2006	14.255
2007	17.501
2008	10.105
2009	-2.64
2010	-3.266
2011	-5.404
2012	3.838
2013	0.064
2014	-2.115
2015	6.721
2016	-0.662
2017	-4.776
2018	1.308
2019	1.074
2020	0.194
2021	0.366
2022	0.963
2023	0.355
2024	1.758