Year	Percent change
1980	1.786
1981	6.274
1982	-1.305
1983	3.799
1984	7.701
1985	3.575
1986	1.684
1987	4.115
1988	5.188
1989	8.527
1990	6.858
1991	-1.971
1992	7.285
1993	8.973
1994	9.627
1995	12.583
1996	1.447
1997	5.046
1998	2.73
1999	-0.959
2000	11.925
2001	2.675
2002	-2.794
2003	-1.3
2004	6.162
2005	3.377
2006	8.227
2007	6.176
2008	-3.092
2009	-18.051
2010	11.785
2011	5.186
2012	2.324
2013	0.701
2014	2.719
2015	4.352
2016	2.134
2017	5.911
2018	1.921
2019	2.619
2020	2.826
2021	2.844
2022	2.689
2023	2.67
2024	2.696