Year	Percent change
1980	-2.309
1981	1.149
1982	0.832
1983	3.438
1984	-0.983
1985	3.578
1986	5.654
1987	2.762
1988	2.909
1989	-1.424
1990	-2.996
1991	9.55
1992	13.828
1993	18.206
1994	5.946
1995	-3.446
1996	6.599
1997	-6.343
1998	4.682
1999	1.856
2000	-2.455
2001	-0.045
2002	2.008
2003	4.388
2004	0.57
2005	3.924
2006	2.294
2007	11.094
2008	-0.299
2009	6.807
2010	10.125
2011	1.107
2012	4.648
2013	3.83
2014	15.421
2015	5.299
2016	1.711
2017	2.374
2018	0.001
2019	3.767
2020	3.15
2021	3.6
2022	3.667
2023	3.768
2024	3.921