Year	Percent change
1980	18.889
1981	8.431
1982	4.834
1983	5.124
1984	2.112
1985	1.273
1986	0.55
1987	3.438
1988	2.111
1989	3.48
1990	9.149
1991	2.292
1992	3.073
1993	4.503
1994	0.434
1995	3.148
1996	3.637
1997	0.797
1998	3.306
1999	-1.808
2000	1.408
2001	2.168
2002	-0.446
2003	2.791
2004	1.264
2005	3.897
2006	4.808
2007	8.338
2008	9.384
2009	-2.206
2010	0.86
2011	4.738
2012	1.037
2013	0
2014	0.093
2015	-2.05
2016	0.951
2017	3.016
2018	2.012
2019	1.998
2020	1.998
2021	1.998
2022	1.998
2023	1.998
2024	1.998