Year	Percent change (Units)
1993	-40.893
1994	-24.000
1995	6.222
1996	32.480
1997	58.470
1998	-1.570
1999	-43.817
2000	5.191
2001	8.716
2002	34.092
2003	25.064
2004	-4.082
2005	-1.136
2006	24.461
2007	7.437
2008	3.700
2009	-3.153
2010	-6.859
2011	32.477
2012	12.706
2013	13.055
2014	6.154
2015	11.612
2016	9.937
2017	-2.296
2018	-3.043
2019	0.768
2020	-7.171
2021	-16.128
2022	14.114
2023	2.934
2024	1.133
2025	1.320
2026	0.549
2027	-0.019
2028	-5.120
2029	-1.391