Year	Percent change (Units)
1996	19.044
1997	18.838
1998	4.659
1999	-16.372
2000	9.557
2001	21.209
2002	18.611
2003	8.426
2004	4.093
2005	17.028
2006	12.808
2007	3.193
2008	11.618
2009	-13.676
2010	16.382
2011	14.547
2012	10.847
2013	7.270
2014	-1.823
2015	2.420
2016	4.927
2017	13.522
2018	6.806
2019	10.067
2020	0.215
2021	17.042
2022	12.189
2023	-4.791
2024	3.602
2025	4.084
2026	4.936
2027	4.800
2028	4.847
2029	4.756