Year	Percent change
1980	19.7
1981	12.7
1982	5.3
1983	3.7
1984	0.784
1985	2.45
1986	1.81
1987	2.502
1988	3.833
1989	5.403
1990	5.87
1991	5.729
1992	4.09
1993	3.291
1994	5.121
1995	5.769
1996	5.82
1997	5.638
1998	7.979
1999	0.254
2000	1.655
2001	1.581
2002	0.725
2003	1.812
2004	2.761
2005	4.519
2006	4.664
2007	2.203
2008	5.462
2009	-0.848
2010	3.286
2011	3.811
2012	3.013
2013	2.185
2014	1.896
2015	-0.9
2016	0.188
2017	0.665
2018	1.064
2019	0.983
2020	1.272
2021	1.6
2022	1.8
2023	2
2024	2