Year	%
1993	7.81
1995	7.3
1996	5.79
1997	5.81
1998	5.74
1999	5.32
2000	5.17
2001	4.2
2002	4.41
2003	4.74
2004	4.37
2005	4.18
2006	4.09
2007	3.98
2008	4.2
2009	4.15
2010	4.2
2011	4.2
2013	4.32
2015	4.31
2016	4.11
2017	4.04
2018	4.01
2019	3.87
2020	4.04
2021	4.18