Year	Percent change
1980	21.613
1981	7.345
1982	-14.984
1983	-2.497
1984	7.71
1985	-3.393
1986	22.199
1987	2.322
1988	-8.666
1989	11.141
1990	-7.213
1991	5.749
1992	11.626
1993	-6.856
1994	4.574
1995	6.57
1996	0.861
1997	10.65
1998	2.594
1999	9.427
2000	14.205
2001	0.954
2002	-6.964
2003	-2.057
2004	11.033
2005	8.317
2006	11.156
2007	11.614
2008	0.013
2009	-13.302
2010	7.722
2011	5.211
2012	6.578
2013	1.597
2014	4.12
2015	8.222
2016	3.721
2017	5.656
2018	-3.141
2019	4.5
2020	4.6
2021	3.2
2022	3.252
2023	2.324
2024	1.464