Year	Percent change
1980	18.498
1981	14.589
1982	10.287
1983	5.275
1984	4.648
1985	4.858
1986	0.199
1987	3.567
1988	4.719
1989	6.334
1990	3.036
1991	6.3
1992	5.996
1993	1.184
1994	0.7
1995	2.838
1996	2.386
1997	7.711
1998	-1.269
1999	1.56
2000	2.436
2001	2.801
2002	0.169
2003	1.577
2004	1.428
2005	6.065
2006	7.308
2007	4.034
2008	8.108
2009	3.645
2010	5.824
2011	9.432
2012	4.533
2013	1.814
2014	1.767
2015	-1.112
2016	1.512
2017	4.41
2018	3.632
2019	1.31
2020	1.914
2021	2.34
2022	2.34
2023	2.34
2024	2.34