Year	Percent change (Units)
1993	13.676
1994	-30.321
1995	8.334
1996	7.088
1997	28.216
1998	9.628
1999	-3.109
2000	14.419
2001	9.038
2002	5.030
2003	3.980
2004	13.752
2005	23.505
2006	7.542
2007	13.860
2008	2.319
2009	-12.874
2010	13.444
2011	12.604
2012	9.498
2013	0.659
2014	6.272
2015	2.974
2016	3.956
2017	6.352
2018	4.405
2019	1.298
2020	0.355
2021	9.045
2022	10.315
2023	-5.925
2024	3.000
2025	2.600
2026	2.600
2027	2.600
2028	2.600
2029	2.600