Year	Percent change (Units)
2002	-1.569
2003	-1.353
2004	2.799
2005	5.610
2006	4.586
2007	7.114
2008	6.163
2009	0.757
2010	3.913
2011	6.809
2012	5.829
2013	5.717
2014	5.594
2015	3.733
2016	1.444
2017	2.041
2018	2.944
2019	2.561
2020	-0.865
2021	1.000
2022	0.766
2023	1.415
2024	1.700
2025	2.250
2026	2.400
2027	2.500
2028	2.500
2029	2.500