Year	Percent change
1980	30.941
1981	-2.512
1982	-6.529
1983	15.849
1984	-20.531
1985	-33.623
1986	-2.766
1987	-8.813
1988	5.547
1989	0.536
1990	1.08
1991	1.549
1992	1.701
1993	2.041
1994	1.347
1995	6.445
1996	-6.722
1997	53.607
1998	3.977
1999	-2.734
2000	-3.029
2001	17.288
2002	-18.597
2003	27.475
2004	16.014
2005	-8.2
2006	-2.51
2007	12.625
2008	23.649
2009	11.199
2010	-10.433
2011	-2.319
2012	4.336
2013	7.149
2014	0.585
2015	4.34
2016	4.817
2017	-0.263
2018	4.228
2019	5.127
2020	3.972
2021	1.698
2022	2.033
2023	2.32
2024	2.3