Year	Percent change
1980	-5.323
1981	6.286
1982	3.884
1983	10.183
1984	7.912
1985	0.604
1986	18.431
1987	19.559
1988	13.733
1989	15.727
1990	13.502
1991	19.997
1992	4.76
1993	6.83
1994	22.754
1995	22.526
1996	15.03
1997	2.49
1998	-23.985
1999	24.912
2000	21.794
2001	-3.639
2002	15.007
2003	10.617
2004	12.32
2005	7.806
2006	12.352
2007	11.642
2008	3.195
2009	-6.756
2010	17.256
2011	14.345
2012	2.404
2013	1.71
2014	1.466
2015	2.094
2016	4.728
2017	7.028
2018	1.719
2019	3.768
2020	3.178
2021	4.073
2022	4.05
2023	4.019
2024	4.054