Year	Percent change
1980	8.098
1981	8.964
1982	1.924
1983	16.19
1984	18.156
1985	2.072
1986	28.559
1987	20.325
1988	6.543
1989	4.874
1990	0.358
1991	13.223
1992	6.762
1993	7.486
1994	5.485
1995	12.822
1996	6.998
1997	8.42
1998	1.934
1999	12.463
2000	17.991
2001	-8.222
2002	11.775
2003	11.189
2004	14.426
2005	6.206
2006	12.091
2007	9.693
2008	2.161
2009	-8.811
2010	25.962
2011	5.15
2012	20.591
2013	0.692
2014	1.984
2015	-1.753
2016	-3.954
2017	7.879
2018	0.479
2019	1.078
2020	3.55
2021	1.84
2022	1.46
2023	1.37
2024	1.37