Year	Percent change
1980	-13.427
1981	16.142
1982	32.697
1983	10.473
1984	14.496
1985	7.78
1986	-12.803
1987	6.048
1988	3.579
1989	25.336
1990	-7.561
1991	13
1992	17.8
1993	59.8
1994	22.3
1995	-1.5
1996	15.2
1997	-6.939
1998	-4.031
1999	-0.401
2000	20.588
2001	7.114
2002	-2.158
2003	2.397
2004	31.436
2005	16.36
2006	18.39
2007	16.411
2008	22.439
2009	9.356
2010	13.412
2011	16.694
2012	34.253
2013	13.062
2014	12.431
2015	0.575
2016	-8.542
2017	5.479
2018	8.071
2019	6.107
2020	3.613
2021	3.671
2022	3.157
2023	2.507
2024	3.221