Year	Percent change
1980	15.8
1981	14
1982	12.8
1983	5.8
1984	44.1
1985	5.6
1986	8.8
1987	1.7
1988	-3.5
1989	1.1
1990	4.7
1991	5.9
1992	-3.8
1993	-0.1
1994	1.979
1995	4.487
1996	0.001
1997	-3.165
1998	3.474
1999	2.349
2000	1.059
2001	3.165
2002	2.27
2003	0.971
2004	1.201
2005	0.382
2006	-2.482
2007	-0.617
2008	2.682
2009	2.939
2010	3.179
2011	1.831
2012	-1.124
2013	-0.567
2014	2.897
2015	3.503
2016	4.17
2017	2.489
2018	1.814
2019	4.553
2020	4.905
2021	3.834
2022	2.87
2023	1.723
2024	1.085