Year	Percent change
1980	15.191
1981	14.399
1982	14.009
1983	12.235
1984	9.009
1985	8.178
1986	8.261
1987	4.593
1988	5.844
1989	6.893
1990	6.542
1991	5.524
1992	5.36
1993	4.926
1994	4.336
1995	4.32
1996	3.273
1997	1.879
1998	1.358
1999	2.778
2000	4.007
2001	2.707
2002	4.036
2003	2.605
2004	3.227
2005	3.735
2006	2.666
2007	4.221
2008	1.432
2009	0.795
2010	2.988
2011	2.378
2012	2.868
2013	0.252
2014	-1.041
2015	0.017
2016	1.57
2017	1.112
2018	1.183
2019	1.344
2020	1.655
2021	1.678
2022	1.893
2023	1.886
2024	1.986