Year	Percent change (Units)
1996	28.007
1997	21.406
1998	18.571
1999	1.041
2000	15.526
2001	-5.327
2002	2.773
2003	9.331
2004	8.559
2005	6.308
2006	17.865
2007	15.796
2008	9.458
2009	-12.587
2010	14.293
2011	5.120
2012	-0.671
2013	1.807
2014	9.368
2015	5.578
2016	7.718
2017	9.875
2018	7.523
2019	3.192
2020	-2.412
2021	16.142
2022	6.793
2023	-8.308
2024	8.633
2025	6.487
2026	5.365
2027	4.200
2028	4.200
2029	4.200