Year	Percent change
1980	-0.143
1981	-16.473
1982	-4.64
1983	3.536
1984	10.438
1985	2.432
1986	-11.175
1987	-7.727
1988	7.275
1989	4.9
1990	8.2
1991	3.8
1992	6.7
1993	-5.7
1994	7.3
1995	22
1996	-2.5
1997	-1.1
1998	11.9
1999	8.557
2000	9.452
2001	7.845
2002	-8.495
2003	23.286
2004	8.916
2005	32.278
2006	25.766
2007	-12.28
2008	25.661
2009	-43.782
2010	7.024
2011	35.174
2012	-4.355
2013	10.551
2014	-11.894
2015	-8.563
2016	-21.183
2017	5.172
2018	-2.072
2019	-16.69
2020	2.59
2021	2.362
2022	2.499
2023	1.653
2024	1.409