Year	%
1998	2.02
1999	1.75
2000	2.1
2001	2.79
2002	3.93
2003	3.89
2004	3.2
2005	3.21
2006	10.74
2007	9.34
2008	8.55
2009	8.65
2010	8.38
2011	7.64
2012	7.37
2013	7.87
2014	6.37
2015	6.59
2016	6.42
2017	5.47
2018	5.08
2019	5.88
2020	4.37
2021	5.01