Year	Percent change
1980	0.752
1981	-2.26
1982	-7.285
1983	2.859
1984	8.028
1985	0.722
1986	5.536
1987	4.765
1988	3.432
1989	5.666
1990	3.6
1991	2.263
1992	9.197
1993	7.088
1994	4.487
1995	4.121
1996	1.238
1997	5.565
1998	6.962
1999	3.943
2000	3.833
2001	3.49
2002	3.292
2003	4.255
2004	4.337
2005	3.871
2006	7.238
2007	8.168
2008	4.65
2009	-0.971
2010	4.952
2011	4.307
2012	4.797
2013	2.269
2014	3.515
2015	3.632
2016	4.246
2017	3.397
2018	2.67
2019	2.925
2020	2.817
2021	3.016
2022	3.117
2023	3.337
2024	3.537