Year	%
1999	10.72
2000	10.36
2001	8.51
2002	5.79
2003	5.76
2004	5.77
2005	5.14
2006	4.96
2007	4.48
2008	4.23
2009	4.61
2010	5.15
2011	3.15
2012	3.15
2013	3.76
2014	2.93
2015	3.3
2016	3.13
2017	7.83
2018	4.28
2019	3.5
2020	2.02
2021	2.09