Year	Percent change
1980	0.705
1981	-9.523
1982	20.759
1983	13.518
1984	-7.62
1985	3.649
1986	2.364
1987	2.8
1988	1.702
1989	4.331
1990	5.696
1991	2.163
1992	1.763
1993	3.833
1994	-3.398
1995	3.32
1996	2.906
1997	1.417
1998	6.5
1999	6.399
2000	5.525
2001	5.753
2002	-3.247
2003	6.874
2004	7.046
2005	-1.004
2006	1.115
2007	3.518
2008	5.737
2009	6.47
2010	6.521
2011	-4.322
2012	5.647
2013	4.801
2014	-0.94
2015	5.868
2016	0.406
2017	4.558
2018	6.6
2019	5.395
2020	5.245
2021	5.023
2022	4.816
2023	4.817
2024	4.781