Year	Percent change (Units)
1980	0.000
1981	0.000
1982	0.000
1983	0.000
1984	0.000
1985	0.000
1987	0.000
1990	0.000
1991	0.000
1992	0.000
1997	-13.472
1998	33.237
1999	25.413
2000	-7.088
2001	23.048
2002	8.253
2003	25.150
2004	24.013
2005	2.948
2006	5.279
2007	19.999
2008	-54.982
2009	-15.604
2010	60.692
2011	12.221
2012	23.237
2013	26.686
2014	-6.564
2015	6.572
2016	-0.129
2017	-1.377
2018	14.145
2019	-8.415
2020	-1.946
2021	18.816
2022	20.158
2023	-15.486
2024	8.931
2025	6.168
2026	5.330
2027	4.330
2028	5.635
2029	5.211