Year	Percent change
1980	13.329
1981	9.186
1982	-5.417
1983	-7.335
1984	-15.31
1985	-4.672
1986	-14.793
1987	4.305
1988	6.073
1989	18.711
1990	17
1991	14.117
1992	23.057
1993	13.366
1994	7.928
1995	13.837
1996	4.094
1997	17.679
1998	3.447
1999	0.561
2000	9.216
2001	11.352
2002	12.775
2003	13.271
2004	25.26
2005	13.542
2006	9.133
2007	38.721
2008	22.194
2009	-13.611
2010	0.76
2011	10.06
2012	9.593
2013	11.33
2014	12.571
2015	0.818
2016	4.303
2017	0.27
2018	-4.466
2019	0.85
2020	2.097
2021	-0.256
2022	-0.047
2023	-0.117
2024	-0.243