Year	Percent change (Units)
1980	0.000
1981	0.000
1982	0.000
1983	0.000
1984	0.000
1985	0.000
1986	0.000
1987	0.000
1988	0.000
1990	0.000
1991	0.000
1992	0.000
1993	-4.658
1994	14.364
1995	-2.892
1996	1.680
1997	18.672
1998	4.215
1999	31.898
2000	-0.309
2001	1.097
2002	15.130
2003	7.232
2004	0.553
2005	2.650
2006	22.312
2007	-10.293
2008	10.535
2009	0.888
2010	7.564
2011	11.465
2012	5.597
2013	9.244
2014	-9.409
2015	-10.326
2016	-19.098
2017	-9.762
2018	4.411
2019	-4.566
2020	-18.157
2021	32.935
2022	6.497
2023	-11.013
2024	3.302
2025	2.473
2026	2.544
2027	2.544
2028	2.544
2029	2.544