Year	%
1999	4.15
2001	3.18
2002	3.6
2003	3.37
2004	4.13
2005	3.6
2006	3.2
2007	4.77
2008	3.05
2009	3.69
2010	6.02
2011	6.04
2012	5.81
2013	5.17
2014	6.78
2015	7.89
2016	11.44
2017	8.79
2019	10.43
2020	14.21
2021	8.49