Year	Percent change
1980	12.32
1981	19.716
1982	11.13
1983	9.355
1984	-3.527
1985	-1.815
1986	4.125
1987	0.054
1988	-0.151
1989	-0.951
1990	1.13
1991	0.238
1992	1.622
1993	-0.089
1994	35.259
1995	15.797
1996	4.596
1997	5.307
1998	0.975
1999	-0.053
2000	1.863
2001	3.92
2002	3.06
2003	-0.93
2004	0.393
2005	6.783
2006	2.229
2007	0.946
2008	8.695
2009	3.714
2010	1.446
2011	3.564
2012	2.577
2013	1.825
2014	0.191
2015	1.785
2016	0.857
2017	-0.749
2018	0.727
2019	1.818
2020	2.001
2021	2
2022	2
2023	2
2024	2