Year	Percent
1991	5.145
1992	5.099
1993	4.812
1994	5.25
1995	5.324
1996	5.715
1997	5.891
1998	5.327
1999	5.443
2000	5.984
2001	6.107
2002	4.289
2003	5.5
2004	5.099
2005	5.062
2006	5.044
2007	5.375
2008	4.176
2009	3.647
2010	3.777
2011	3.981
2012	4.226
2013	4.134
2014	4.354
2015	3.861
2016	3.704
2017	3.774
2018	3.75
2019	3.75
2020	3.749
2021	3.763
2022	3.768