Year	Percent change
1980	13.727
1981	4.104
1982	18.788
1983	-6.318
1984	12.056
1985	4.17
1986	15.051
1987	21.108
1988	26.114
1989	21.145
1990	11.686
1991	17.28
1992	13.807
1993	12.735
1994	14.245
1995	15.445
1996	-5.525
1997	7.234
1998	8.242
1999	9.031
2000	17.488
2001	-4.211
2002	5.887
2003	9.134
2004	14.631
2005	7.76
2006	10.788
2007	8.894
2008	6.264
2009	-12.14
2010	14.22
2011	9.509
2012	4.878
2013	2.719
2014	0.256
2015	1.571
2016	2.824
2017	7.125
2018	6.197
2019	4.356
2020	4.317
2021	4.198
2022	4.005
2023	4.12
2024	4.067