Year	Percent change
1980	-1.016
1981	-3.894
1982	-8.21
1983	-5.329
1984	15.988
1985	-13.031
1986	3.706
1987	0.9
1988	4.7
1989	5.3
1990	-14.644
1991	-1.662
1992	11.33
1993	-1.324
1994	1.418
1995	2.399
1996	4.375
1997	30.012
1998	11.218
1999	4.284
2000	8.028
2001	3.898
2002	7.182
2003	3.72
2004	19.219
2005	7.493
2006	26.17
2007	17.986
2008	17.664
2009	11.957
2010	18.132
2011	13.375
2012	4.687
2013	4.41
2014	3.979
2015	3.658
2016	2.131
2017	1.58
2018	2.184
2019	2.643
2020	3.171
2021	3.318
2022	2.661
2023	2.285
2024	2.987