Year	Percent change
1980	-2.629
1981	5.198
1982	1.976
1983	-2
1984	0.4
1985	71.615
1986	12.407
1987	9.833
1988	12.046
1989	14.006
1990	17.875
1991	59.747
1992	2.31
1993	8.242
1994	-13.535
1995	58.119
1996	-10.459
1997	38.718
1998	-30.73
1999	2.832
2000	37.497
2001	-2.271
2002	14.507
2003	40.064
2004	3.638
2005	16.404
2006	-26.361
2007	24.775
2008	48.571
2009	-41.68
2010	-1.008
2011	-0.922
2012	39.64
2013	66.49
2014	17.789
2015	0.927
2016	-1.263
2017	51.807
2018	47.803
2019	40.753
2020	32.565
2021	32.435
2022	27.074
2023	19.642
2024	15.691