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	1.567
2011	14.696
2012	-5.119
2013	10.615
2014	-7.092
2015	2.120
2016	4.349
2017	14.776
2018	11.760
2019	16.188
2020	-20.029
2021	-4.500
2022	16.446
2023	28.415
2024	5.805
2025	11.961
2026	10.212
2027	10.026
2028	9.095
2029	8.740