Year	Percent change (Units)
2002	-2.638
2003	-1.562
2004	0.981
2005	4.396
2006	5.150
2007	5.571
2008	8.611
2009	1.169
2010	2.809
2011	5.806
2012	6.107
2013	5.501
2014	6.048
2015	4.561
2016	2.369
2017	1.228
2018	3.004
2019	2.752
2020	0.811
2021	0.027
2022	1.045
2023	0.936
2024	1.700
2025	2.250
2026	2.400
2027	2.500
2028	2.500
2029	2.500