Year	Percent change (Units)
2001	0.695
2002	8.317
2003	-4.351
2004	-1.888
2005	-3.746
2006	1.301
2007	6.905
2008	6.579
2009	-5.620
2010	-2.468
2011	7.520
2012	-2.853
2013	3.805
2014	1.667
2015	9.379
2016	4.746
2017	3.280
2018	1.387
2019	13.822
2020	-4.275
2021	1.804
2022	0.677
2023	3.853
2024	3.514
2025	2.486
2026	2.223
2027	2.056
2028	2.037
2029	1.935