Year	%
1999	8.98
2000	9.27
2001	8.88
2002	7.68
2003	7.4
2004	7.41
2005	5.73
2006	5.96
2007	6.13
2008	5.85
2009	6.83
2010	7.6
2011	6.11
2012	6.11
2013	3.82
2014	3.04
2015	2.88
2016	2.95
2017	5
2018	3.43
2019	3.34
2020	2.9
2021	2.92