Year	Percent change
1980	-1.08
1981	-10.314
1982	3.093
1983	-3.874
1984	-6.03
1985	9.3
1986	-5.832
1987	-2.93
1988	1.999
1989	3.135
1990	-2.153
1991	1.201
1992	0.7
1993	1.1
1994	2.2
1995	2
1996	1.5
1997	0.996
1998	2.5
1999	2.5
2000	0.448
2001	2.4
2002	2.377
2003	6.573
2004	3.832
2005	7.094
2006	9.116
2007	3.254
2008	8.186
2009	2.426
2010	6.672
2011	4.398
2012	3.142
2013	4.815
2014	6.55
2015	3.82
2016	4.179
2017	3.875
2018	3
2019	4
2020	4.5
2021	5
2022	5
2023	5
2024	5