Year	Percent change
1980	12.02
1981	8.154
1982	15.874
1983	10.793
1984	6.517
1985	7.695
1986	8.616
1987	14.89
1988	23.42
1989	4.665
1990	8.787
1991	6.237
1992	-0.208
1993	4.027
1994	-0.786
1995	7.03
1996	5.83
1997	8.027
1998	0.721
1999	9.667
2000	1.987
2001	0.25
2002	6.07
2003	4.625
2004	2.706
2005	4.556
2006	8.364
2007	8.28
2008	6.242
2009	-7.653
2010	8.564
2011	6.048
2012	4.456
2013	11.343
2014	4.149
2015	-1.698
2016	4.304
2017	2.908
2018	4.592
2019	3.914
2020	4.1
2021	3.994
2022	4.23
2023	5.442
2024	3.866