Year	Percent change (Units)
1999	-2.568
2000	-7.040
2001	5.755
2002	0.852
2003	-8.511
2004	-9.751
2005	-7.798
2006	19.994
2007	55.186
2008	33.717
2009	10.639
2010	-45.290
2011	82.965
2012	4.963
2013	20.621
2014	43.946
2015	9.998
2016	4.332
2017	16.219
2018	5.531
2019	-10.296
2020	4.767
2021	-28.453
2022	-0.075
2023	-3.473
2024	0.189
2025	3.139
2026	-2.600
2027	0.240
2028	0.331
2029	1.051