Year	Percent change (Units)
1996	4.489
1997	-13.046
1998	-11.420
1999	0.554
2000	10.636
2001	-6.386
2002	11.294
2003	1.843
2004	14.587
2005	11.340
2006	0.549
2007	-5.177
2008	19.231
2009	-25.128
2010	5.060
2011	-2.142
2012	27.701
2013	3.098
2014	-7.387
2015	-5.669
2016	-3.153
2017	7.602
2018	5.724
2019	-5.568
2020	-0.702
2021	15.185
2022	-8.655
2023	12.998
2024	1.524
2025	3.024
2026	2.076
2027	1.674
2028	1.331
2029	1.331