Year	%
1999	10.72
2000	10.36
2001	8.51
2002	5.79
2003	5.76
2004	5.77
2005	5.53
2006	5.41
2007	5.71
2008	5.31
2009	5.3
2010	5.15
2011	5.92
2012	5.92
2013	4.49
2014	3.99
2015	4.23
2016	4.16
2017	8.56
2018	6.17
2019	5.83
2020	4.32
2021	4.39