Year	Percent change
1980	13.163
1981	25.397
1982	18.987
1983	33.511
1984	21.514
1985	16.721
1986	10.393
1987	8.906
1988	11.916
1989	11.482
1990	14.045
1991	9.323
1992	8.048
1993	5.908
1994	3.873
1995	3.392
1996	2.839
1997	2.078
1998	2.821
1999	1.697
2000	3.824
2001	3.911
2002	4.022
2003	2.28
2004	2.568
2005	2.54
2006	2.523
2007	2.742
2008	0.842
2009	-0.141
2010	2.444
2011	3.498
2012	2.09
2013	0.171
2014	-0.27
2015	0.291
2016	0.881
2017	1.618
2018	0.635
2019	4.029
2020	-1.661
2021	4.619
2022	-0.583
2023	4.038
2024	0.319