Year	Percent change
1980	19.199
1981	-0.798
1982	11.153
1983	10.014
1984	-3.819
1985	-0.496
1986	32.918
1987	12.383
1988	-4.674
1989	13.835
1990	10.1
1991	17.466
1992	14.166
1993	3.572
1994	-2.794
1995	6.682
1996	2.313
1997	-0.979
1998	5.368
1999	-7.648
2000	12.879
2001	7.957
2002	14.21
2003	13.594
2004	1.424
2005	16.657
2006	9.365
2007	1.9
2008	-2.05
2009	-0.083
2010	5.556
2011	7.066
2012	-3.306
2013	11.041
2014	-4.167
2015	3.722
2016	-5.11
2017	-3.42
2018	6.626
2019	3.197
2020	6.002
2021	4.08
2022	3.698
2023	3.029
2024	3.887