Year	Percent change
1980	-17.031
1981	-24.3
1982	7.3
1983	-15.4
1984	25.2
1985	0.3
1986	34.5
1987	4.7
1988	38.3
1989	8
1990	29.2
1991	2
1992	-4.097
1993	39.598
1994	6.464
1995	16.858
1996	-5.272
1997	0.38
1998	8.503
1999	-14.326
2000	-5.309
2001	-7.24
2002	-3.356
2003	12.984
2004	3.775
2005	26.211
2006	16.516
2007	5.656
2008	-8.841
2009	-4.095
2010	20.474
2011	-0.06
2012	-7.158
2013	14.56
2014	-4.333
2015	4.591
2016	9.766
2017	8.038
2018	-1.478
2019	0.207
2020	5.57
2021	3.113
2022	3.139
2023	3.088
2024	2.991