Year	%
1995	4.63
1996	4.23
1997	4.26
1998	4.3
2000	3.86
2001	3.91
2002	3.83
2003	3.83
2004	3.76
2005	16.36
2006	12.78
2007	12.84
2008	12.82
2009	12.74
2010	12.75
2011	12.74
2012	13.37
2013	13.34
2014	13.34
2015	13.48
2016	13.28
2017	13.24
2018	13.23
2019	13.23
2020	13.23
2021	13.23