Year	%
1988	5.74
1989	5.62
1990	5.01
1991	5.04
1992	5.03
1993	5.11
1994	5.15
1995	5.49
1996	5.68
1997	5.18
1998	4.98
1999	5.22
2000	6.04
2001	6.39
2002	6.15
2003	5.82
2004	5.38
2005	5.24
2006	5.3
2007	5.11
2008	4.91
2009	4.91
2010	4.41
2011	5.11
2012	4.88
2013	3.08
2014	5.09
2015	4.47
2016	4.8
2017	4.99
2018	5.17
2019	8.46
2020	4.99
2021	4.84