Year	Percent change (Units)
1999	10.999
2000	-7.721
2001	10.089
2002	4.736
2003	8.933
2004	1.983
2005	0.321
2006	2.353
2007	0.698
2008	10.040
2009	-14.429
2010	2.032
2011	3.185
2012	0.396
2013	0.117
2014	7.583
2015	1.671
2016	7.257
2017	8.156
2018	3.374
2019	1.355
2020	-13.126
2021	19.966
2022	6.269
2023	5.508
2024	6.163
2025	6.646
2026	5.893
2027	4.894
2028	4.809
2029	4.106