Year	Percent change
1980	-5.564
1981	0.555
1982	3.137
1983	1.971
1984	5.362
1985	9.93
1986	8.479
1987	-1.178
1988	4.224
1989	5.398
1990	2.376
1991	4.031
1992	-0.131
1993	-1.415
1994	13.289
1995	7.003
1996	3.121
1997	9.208
1998	7.575
1999	2.553
2000	13.667
2001	2.395
2002	6.376
2003	-1.024
2004	7.137
2005	11.293
2006	13.965
2007	5.838
2008	4.77
2009	-11.944
2010	0.541
2011	7.444
2012	2.709
2013	1.471
2014	3.897
2015	4.561
2016	4.232
2017	3.56
2018	2.862
2019	2.34
2020	2.524
2021	2.462
2022	2.4
2023	2.4
2024	2.4