Year	Percent change
1980	0.668
1981	2.533
1982	-1.391
1983	-0.924
1984	4.346
1985	4.188
1986	0.723
1987	6.031
1988	4.61
1989	4.326
1990	0.097
1991	3.252
1992	5.624
1993	6.23
1994	-1.303
1995	4.08
1996	3.578
1997	4.994
1998	2.902
1999	-1.89
2000	7.291
2001	2.723
2002	3.754
2003	4.547
2004	6.232
2005	6.051
2006	6.567
2007	6.188
2008	4.232
2009	-2.432
2010	3.731
2011	3.836
2012	4.129
2013	2.792
2014	3.058
2015	3.84
2016	3.752
2017	4.93
2018	3.696
2019	3.36
2020	3.427
2021	3.496
2022	3.566
2023	3.637
2024	3.71