Year	Percent change (Units)
1980	0.000
1981	0.000
1982	0.000
1983	0.000
1987	0.000
1988	0.000
1989	20.503
1990	12.113
1991	13.123
1992	4.323
1993	0.091
1994	-3.549
1995	10.333
1996	8.511
1997	4.679
1998	-6.332
1999	-3.215
2000	-2.838
2001	12.890
2002	11.888
2003	-3.503
2004	-0.339
2005	3.807
2006	-0.407
2007	1.300
2008	6.611
2009	2.818
2010	3.598
2011	4.252
2012	4.207
2013	-6.004
2014	1.111
2015	5.838
2016	1.104
2017	3.367
2018	-4.390
2019	0.471
2020	-3.140
2021	-1.725
2022	0.085
2023	5.546
2024	4.366
2025	2.815
2026	0.975
2027	3.056
2028	2.105
2029	2.677