Year	Percent change (Units)
1993	-52.354
1994	-19.872
1995	-3.825
1996	33.338
1997	36.717
1998	6.923
1999	-40.960
2000	7.079
2001	-1.676
2002	13.887
2003	22.214
2004	-4.663
2005	8.224
2006	29.826
2007	6.368
2008	6.813
2009	-3.585
2010	-9.406
2011	32.548
2012	4.084
2013	9.544
2014	-12.294
2015	24.957
2016	13.046
2017	-5.251
2018	13.521
2019	4.248
2020	-5.930
2021	-17.522
2022	13.624
2023	15.101
2024	2.380
2025	1.698
2026	0.831
2027	-0.035
2028	-5.129
2029	-1.643