Year	Percent change
1980	12.259
1981	7.556
1982	12.058
1983	8.346
1984	4.847
1985	7.054
1986	-2.7
1987	-2.85
1988	4.191
1989	-0.322
1990	-0.807
1991	2.502
1992	-1.991
1993	0.614
1994	24.72
1995	7.772
1996	6.109
1997	2.929
1998	4.911
1999	-1.08
2000	-0.169
2001	4.727
2002	2.3
2003	2.04
2004	-0.4
2005	6.409
2006	2.336
2007	-0.233
2008	10.668
2009	0.864
2010	-0.608
2011	2.769
2012	3.817
2013	0.525
2014	-0.258
2015	0.914
2016	-0.194
2017	0.351
2018	2
2019	2
2020	2
2021	2
2022	2
2023	2
2024	2