Year	Percent change
1980	0.61
1981	0.3
1982	-3.939
1983	-4.042
1984	-0.201
1985	-1.676
1986	-2.574
1987	2.463
1988	2.91
1989	3.79
1990	4.636
1991	5.267
1992	1.646
1993	4.269
1994	4.667
1995	4.678
1996	4.361
1997	4.954
1998	5.029
1999	0.427
2000	2.508
2001	1.684
2002	2.486
2003	2.711
2004	4.173
2005	4.421
2006	4.797
2007	4.564
2008	6.148
2009	3.357
2010	4.127
2011	5.204
2012	5.122
2013	6.796
2014	5.461
2015	4.857
2016	4.264
2017	4.195
2018	4.3
2019	4
2020	3.9
2021	3.8
2022	3.7
2023	3.7
2024	3.7