Year	Percent change (Units)
1995	11.151
1996	-3.157
1997	11.604
1998	8.280
1999	24.431
2000	-12.536
2001	-14.673
2002	-14.009
2003	22.078
2004	15.716
2005	11.868
2006	-17.058
2007	7.436
2008	10.501
2009	9.661
2010	-7.354
2011	8.414
2012	15.210
2013	-4.488
2014	5.302
2015	10.843
2016	2.652
2017	0.449
2018	5.126
2019	1.201
2020	-13.236
2021	15.257
2022	20.008
2023	4.842