Year	Percent change
1980	6.079
1981	17.096
1982	11.501
1983	15.947
1984	13.904
1985	14.523
1986	2.145
1987	-3.992
1988	5.245
1989	2.983
1990	8.378
1991	6.044
1992	8.492
1993	6.144
1994	3.845
1995	4.831
1996	2.889
1997	6.178
1998	2.704
1999	0.332
2000	6.549
2001	4.483
2002	-1.101
2003	-2.667
2004	1.291
2005	2.49
2006	5.373
2007	4.452
2008	8.201
2009	6.112
2010	1.956
2011	2.565
2012	9.104
2013	5.103
2014	1.423
2015	4.658
2016	4.979
2017	-0.928
2018	2.087
2019	1.098
2020	6.21
2021	2.758
2022	1.234
2023	1.414
2024	1.736