Year	Percent change (Units)
1993	9.008
1994	45.893
1995	-10.886
1996	8.017
1997	52.075
1998	-19.653
1999	17.060
2000	-10.926
2001	43.329
2002	2.536
2003	36.692
2004	10.625
2005	24.331
2006	-9.554
2007	-2.987
2008	13.232
2009	-3.525
2010	17.828
2011	-12.263
2012	9.987
2013	11.086
2014	31.079
2015	3.195
2016	33.714
2017	0.794
2018	-1.230
2019	6.286
2020	-15.053
2021	-22.001
2022	23.890
2023	53.573
2024	9.971
2025	13.705
2026	6.542
2027	7.567
2028	4.939
2029	4.346