Year	Percent change (Units)
1996	2.796
1997	2.667
1998	1.633
1999	1.919
2000	1.839
2001	1.317
2002	-0.159
2003	-0.245
2004	1.745
2005	4.087
2006	4.396
2007	3.639
2008	6.572
2009	8.154
2010	3.618
2011	3.851
2012	6.302
2013	2.138
2014	0.724
2015	0.034
2016	-0.916
2017	0.098
2018	1.040
2019	2.209
2020	0.964
2021	1.772
2022	5.020
2023	6.210
2024	4.018
2025	2.988
2026	2.500
2027	2.075
2028	2.038
2029	2.000