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	2.148
1994	-9.231
1995	-5.716
1996	-0.792
1997	22.236
1998	5.540
1999	24.232
2000	23.893
2001	1.022
2002	5.056
2003	0.359
2004	-11.052
2005	10.594
2006	2.718
2007	1.509
2008	17.200
2009	-20.074
2010	3.631
2011	14.286
2012	6.650
2013	5.742
2014	6.041
2015	8.868
2016	-1.079
2017	-8.125
2018	4.418
2019	4.260
2020	-22.412
2021	24.663
2022	11.962
2023	0.528
2024	5.265
2025	3.254
2026	2.624
2027	2.763
2028	2.544
2029	2.544