Year	Percent change (Units)
2001	-1.157
2002	-8.209
2003	-11.095
2004	-0.519
2005	3.666
2006	-10.263
2007	10.605
2008	8.028
2009	9.580
2010	-21.439
2011	-28.563
2012	23.682
2013	0.538
2014	47.028
2015	16.396
2016	3.708
2017	-8.141
2018	25.588
2019	8.550
2020	-30.958
2021	2.946
2022	10.976
2023	18.913
2024	-3.222
2025	7.387
2026	2.145
2027	2.875
2028	3.237
2029	3.481