Year	Percent change (Units)
1980	0.003
1981	0.000
1983	0.000
1984	0.000
1992	0.000
1993	4.868
1994	-8.560
1995	-3.519
1996	-1.743
1997	15.762
1998	6.844
1999	18.905
2000	21.896
2001	0.591
2002	5.717
2003	1.272
2004	-8.257
2005	8.535
2006	-0.247
2007	2.352
2008	12.586
2009	-17.079
2010	2.828
2011	11.449
2012	7.074
2013	6.824
2014	6.507
2015	7.783
2016	-0.665
2017	-4.525
2018	2.423
2019	2.853
2020	-22.998
2021	32.134
2022	10.175
2023	-2.963
2024	5.296
2025	3.251
2026	2.650
2027	2.761
2028	2.544
2029	2.544