Year	Percent change (Units)
1993	-89.003
1994	-13.027
1995	-9.699
1996	14.228
1997	4.358
1998	-12.037
1999	1.244
2000	-2.309
2001	6.246
2002	37.911
2003	14.123
2004	2.852
2005	11.424
2006	-3.650
2007	3.058
2008	-6.536
2009	14.684
2010	21.576
2011	18.608
2012	35.905
2013	-10.723
2014	-11.487
2015	13.062
2016	7.118
2017	10.075
2018	2.879
2019	11.895
2020	5.427
2021	17.137
2022	-2.849
2023	8.914
2024	5.131
2025	6.160
2026	9.260
2027	7.710
2028	8.485
2029	0.000