Year	%
1989	5.75
1990	5.73
1991	5.72
1992	5.74
1993	5.76
1995	5.34
1996	5.09
1997	4.99
1998	4.51
1999	4.19
2000	4.15
2001	4.09
2002	4
2003	3.86
2004	3.73
2005	3.69
2006	3.68
2007	3.63
2008	3.68
2009	3.7
2010	3.71
2011	3.72
2012	3.57
2013	3.55
2014	3.54
2015	3.56
2016	3.57
2017	3.97
2018	4.2
2019	10.17
2020	3.52
2021	3.59