Year	%
1993	7.35
1995	8.68
1996	4.54
1997	6.74
1998	4.35
1999	7.18
2000	3.54
2001	3.01
2002	2.88
2003	2.61
2004	3.22
2005	2.42
2006	2.3
2007	2.49
2008	2.49
2009	2.36
2010	2.49
2011	2.42
2013	2.4
2015	2.7
2016	2.45
2017	2.74
2018	2.64
2019	3.67
2020	3.61
2021	4.44