Year	Percent
1991	4.905
1992	6.876
1993	6.998
1994	5.707
1995	6.23
1996	6.066
1997	5.647
1998	5.7
1999	5.055
2000	4.702
2001	4.796
2002	5.237
2003	5.922
2004	5.857
2005	4.752
2006	4.119
2007	3.886
2008	6.16
2009	5.643
2010	6.162
2011	6.168
2012	6.188
2013	6.011
2014	6.158
2015	5.87
2016	6.024
2017	5.991
2018	5.863
2019	5.824
2020	5.838
2021	5.829
2022	5.816