Year	Percent change
1980	2.692
1981	11.61
1982	5.817
1983	-0.925
1984	-0.443
1985	-0.236
1986	2.031
1987	0.416
1988	0.946
1989	0.866
1990	2.975
1991	2.552
1992	1.845
1993	4.031
1994	4.128
1995	3.973
1996	1.964
1997	3.924
1998	3.686
1999	2.294
2000	3.037
2001	2.514
2002	2.614
2003	1.931
2004	2.726
2005	2.522
2006	2.576
2007	0.697
2008	4.684
2009	1.84
2010	2.041
2011	2.513
2012	3.227
2013	0.979
2014	0.771
2015	1.176
2016	0.9
2017	1.261
2018	1.741
2019	1.827
2020	1.939
2021	1.958
2022	1.971
2023	1.98
2024	1.986