Year	Percent change
1980	11.4
1981	17.6
1982	6.5
1983	16.3
1984	15.6
1985	7.6
1986	12.3
1987	23.7
1988	15.3
1989	-4.068
1990	3.86
1991	13.83
1992	12.656
1993	8.359
1994	15.768
1995	22.845
1996	10.289
1997	19.24
1998	15.777
1999	16.391
2000	19.107
2001	-2.485
2002	15.967
2003	16.509
2004	20.224
2005	9.209
2006	13.39
2007	12.4
2008	6.022
2009	0.399
2010	13.494
2011	17.079
2012	4.386
2013	4.473
2014	1.089
2015	-0.581
2016	2.085
2017	3.754
2018	3.968
2019	2.339
2020	2.686
2021	3.827
2022	3.641
2023	3.498
2024	3.506