Year	Percent change
1980	-5.025
1981	-5.379
1982	4.444
1983	10.479
1984	0
1986	6.859
1987	6.428
1988	-11.82
1989	16.105
1990	-17.648
1991	-20.742
1992	-31.421
1993	-29.029
1994	5.572
1995	39.585
1996	-0.47
1997	-23.554
1998	27.795
1999	-45.127
2000	32.457
2001	20.026
2002	34.104
2003	11.342
2004	29.399
2005	29.577
2006	3.306
2007	79.136
2008	13.325
2009	-18.105
2010	38.654
2011	9.813
2012	-9.506
2013	21.721
2014	29.512
2015	-5.068
2016	0.971
2017	13.485
2018	-13.019
2019	-4.17
2020	15.983
2021	7.676
2022	1.731
2023	1.288
2024	-0.171