Year	Percent change (Units)
1993	-16.225
1994	-17.099
1995	-1.875
1996	-2.189
1997	-2.239
1998	9.578
1999	-1.134
2000	-22.003
2001	5.798
2002	11.671
2003	4.907
2004	16.783
2005	11.130
2006	10.786
2007	1.428
2008	-2.473
2009	-11.587
2010	18.401
2011	-0.228
2012	-2.151
2013	5.798
2014	8.290
2015	10.153
2016	5.246
2017	8.971
2018	3.047
2019	4.834
2020	-2.867
2021	17.397
2022	24.258
2023	-9.171
2024	-1.000
2025	2.000
2026	2.500
2027	2.500
2028	2.500
2029	2.500