Year	Percent change
1980	13.057
1981	13.333
1982	11.978
1983	9.46
1984	7.674
1985	5.831
1986	2.539
1987	3.289
1988	2.701
1989	6.569
1990	0.323
1991	3.403
1992	2.456
1993	2.235
1994	1.664
1995	1.769
1996	2.079
1997	1.27
1998	0.673
1999	0.577
2000	1.815
2001	1.784
2002	1.937
2003	2.172
2004	2.335
2005	1.888
2006	1.892
2007	1.605
2008	3.161
2009	0.103
2010	1.737
2011	2.288
2012	2.215
2013	0.988
2014	0.613
2015	0.088
2016	0.307
2017	1.163
2018	2.102
2019	1.323
2020	1.547
2021	1.577
2022	1.748
2023	1.848
2024	1.887