Year	Percent change
1980	2.8
1981	-3.514
1982	-11.915
1983	1.51
1984	-19.118
1985	-23.877
1986	48.191
1987	34.989
1988	8.215
1989	2.769
1990	2.035
1991	13.218
1992	11.7
1993	7.904
1994	8.323
1995	4.237
1996	2.011
1997	18.293
1998	20.384
1999	8.112
2000	15.773
2001	14.85
2002	13.143
2003	14.216
2004	-6.298
2005	-8.417
2006	-2.671
2007	3.506
2008	-4.482
2009	2.748
2010	-10.93
2011	-10.316
2012	13.079
2013	21.092
2014	4.344
2015	1.756
2016	-0.711
2017	8.665
2018	1.073
2019	-2.216
2020	0.922
2021	0.939
2022	1.81
2023	2.159
2024	2.014