Year	Percent change (Units)
1998	8.895
1999	5.827
2000	26.654
2001	11.266
2002	25.071
2003	31.477
2004	26.920
2005	24.338
2006	26.019
2007	21.128
2008	10.836
2009	-10.560
2010	28.461
2011	10.964
2012	5.882
2013	8.760
2014	4.295
2015	-2.156
2016	0.679
2017	6.954
2018	4.249
2019	1.957
2020	-3.150
2021	18.517
2022	-0.166
2023	-0.319
2024	2.518
2025	2.000
2026	3.000
2027	3.000
2028	3.000
2029	3.000