Year	Percent change
1980	15.331
1981	-0.453
1982	9.372
1983	10.207
1984	4.871
1985	-16.25
1986	-6.469
1987	8.474
1988	24.517
1989	29.12
1990	21.7
1991	22.594
1992	5.708
1993	15.957
1994	26.158
1995	24.842
1996	5.211
1997	6.238
1998	-19.084
1999	12.659
2000	22.57
2001	-6.847
2002	4.46
2003	2.756
2004	19.281
2005	6.03
2006	14.411
2007	3.32
2008	-3.899
2009	-21.902
2010	12.117
2011	5.6
2012	-0.607
2013	1.826
2014	3.801
2015	1.693
2016	1.55
2017	8.819
2018	6.948
2019	3.551
2020	4.042
2021	4.171
2022	4.134
2023	3.992
2024	3.929