Year	Percent change
1980	5.652
1981	1.943
1982	-20.73
1983	-16.051
1984	-4.661
1985	-9.795
1986	17.013
1987	-6.632
1988	13.109
1989	-0.503
1990	15.193
1991	15.008
1992	3.988
1993	-1.364
1994	0.559
1995	0.212
1996	2.637
1997	1.104
1998	2.893
1999	-3.763
2000	5.625
2001	-1.211
2002	-2.819
2003	11.242
2004	7.958
2005	5.574
2006	2.788
2007	1.847
2008	6.25
2009	-2.059
2010	5.039
2011	9.997
2012	5.411
2013	2.674
2014	3.678
2015	4.106
2016	1.671
2017	-0.742
2018	2.215
2019	1.783
2020	2.124
2021	2.234
2022	2.232
2023	2.329
2024	2.349