Year	Percent change (Units)
1993	-15.417
1994	-41.156
1995	56.394
1996	10.791
1997	5.466
1998	5.667
1999	-5.133
2000	68.776
2001	13.596
2002	11.393
2003	9.598
2004	15.568
2005	-2.901
2006	7.336
2007	24.128
2008	30.647
2009	-18.211
2010	31.347
2011	87.151
2012	10.302
2013	-2.642
2014	-14.578
2015	-10.972
2016	11.737
2017	11.938
2018	30.728
2019	6.436
2020	-13.526
2021	3.260
2022	12.560
2023	20.204
2024	5.671
2025	9.242
2026	7.973
2027	4.921
2028	4.510
2029	3.060