Year	Percent change
1980	0.599
1981	1.625
1982	-0.548
1983	6.352
1984	20.228
1985	4.271
1986	3.965
1987	3.383
1988	9.226
1989	0.504
1990	4.918
1991	1.735
1992	7.711
1993	11.169
1994	12.96
1995	9.136
1996	5.233
1997	8.892
1998	8.741
1999	11.61
2000	9.124
2001	-3.426
2002	0.66
2003	-1.815
2004	5.257
2005	2.124
2006	0.8
2007	1.44
2008	-5.275
2009	-14.897
2010	8.455
2011	4.985
2012	2.566
2013	2.586
2014	6.239
2015	3.411
2016	0.628
2017	0.684
2018	3.336
2019	2.526
2020	2.579
2021	2.105
2022	2.048
2023	1.529
2024	2.133