Year	Percent change
1980	1.137
1981	14.701
1982	-7.955
1983	3.06
1984	2.97
1985	-0.299
1986	11.437
1987	8.832
1988	8.644
1989	18.843
1990	4.489
1991	4.416
1992	-1.643
1993	4.004
1994	18.287
1995	2.991
1996	-2.406
1997	10.088
1998	6.339
1999	6.701
2000	7.313
2001	10.144
2002	0.399
2003	-0.146
2004	4.704
2005	0.39
2006	4.727
2007	16.257
2008	-2.588
2009	-4.51
2010	10.582
2011	-3.573
2012	1.634
2013	-0.732
2014	-2.936
2015	-2.818
2016	0.223
2017	4.584
2018	2.938
2019	2.95
2020	3.686
2021	3.797
2022	4.102
2023	4.082
2024	4.112