Year	Percent change (Units)
1992	-90.162
1993	118.936
1994	-1.523
1995	18.899
1996	0.908
1997	-6.074
1998	-8.423
1999	9.003
2000	-11.784
2001	19.544
2002	-12.464
2003	0.292
2004	28.475
2005	-2.335
2006	-8.480
2007	29.384
2008	11.126
2009	7.107
2010	-1.514
2011	12.626
2012	-8.242
2013	9.862
2014	-8.080
2015	2.716
2016	10.196
2017	14.035
2018	9.482
2019	17.060
2020	-14.435
2021	-8.031
2022	11.221
2023	29.986
2024	2.476
2025	10.113
2026	8.758
2027	8.702
2028	8.494
2029	8.019