Year	Percent change (Units)
1993	-13.005
1994	-19.807
1995	-5.424
1996	7.085
1997	9.915
1998	2.122
1999	3.656
2000	5.443
2001	5.322
2002	-0.017
2003	7.030
2004	7.027
2005	-0.176
2006	3.103
2007	8.543
2008	7.566
2009	2.886
2010	-0.472
2011	5.956
2012	-0.088
2013	10.915
2014	4.024
2015	3.876
2016	4.336
2017	4.740
2018	3.459
2019	4.601
2020	-7.149
2021	5.507
2022	6.332
2023	4.196
2024	4.446
2025	4.179
2026	3.954
2027	3.964
2028	4.018
2029	3.983