Year	Percent change
1980	10.183
1981	12.462
1982	10.803
1983	5.816
1984	4.339
1985	3.951
1986	4.174
1987	4.365
1988	4.023
1989	4.995
1990	4.765
1991	5.615
1992	1.493
1993	1.865
1994	0.136
1995	2.189
1996	1.58
1997	1.612
1998	0.987
1999	1.744
2000	2.738
2001	2.507
2002	2.276
2003	2.742
2004	1.841
2005	2.23
2006	2.018
2007	2.131
2008	2.385
2009	0.299
2010	1.769
2011	2.89
2012	1.53
2013	0.925
2014	1.92
2015	1.119
2016	1.435
2017	1.603
2018	2.243
2019	1.693
2020	1.929
2021	2.004
2022	2.149
2023	2.146
2024	1.987