Year	Percent change
1980	-7
1981	-5.5
1982	-3.5
1983	-3.4
1984	63.738
1985	4.535
1986	12.801
1987	17.485
1988	7.781
1989	3.477
1990	7.299
1991	2.485
1992	2.781
1993	13.358
1994	7.344
1995	5.554
1996	23.364
1997	12.034
1998	11.706
1999	10.487
2000	-9.657
2001	10.287
2002	-0.417
2003	9.557
2004	21.329
2005	15.173
2006	26.25
2007	20.97
2008	24.831
2009	-21.523
2010	36.251
2011	48.684
2012	10.329
2013	-1.186
2014	-17.094
2015	-7.674
2016	-3.842
2017	-1.093
2018	2.568
2019	4.086
2020	5.855
2021	5.763
2022	8.717
2023	7.664
2024	7.812