Year	Percent change
1980	3.7
1981	0.644
1982	-3.542
1983	-2.528
1984	0.51
1985	-0.6
1986	0.1
1987	3.579
1988	3.892
1989	3.943
1990	3.101
1991	3
1992	4.6
1993	3.4
1994	3.5
1995	4.4
1996	2.8
1997	4.1
1998	4.6
1999	3.7
2000	2.5
2001	2.4
2002	3.867
2003	2.531
2004	3.152
2005	3.26
2006	5.38
2007	6.304
2008	3.281
2009	0.526
2010	2.869
2011	4.162
2012	2.97
2013	3.698
2014	4.174
2015	4.14
2016	3.092
2017	2.76
2018	3.1
2019	3.49
2020	3.63
2021	3.8
2022	3.628
2023	3.51
2024	3.5