Year	Percent
1991	1.872
1992	1.902
1993	1.867
1994	1.778
1995	1.222
1996	1.066
1997	1.021
1998	1.058
1999	1.094
2000	0.848
2001	0.609
2002	0.684
2003	0.789
2004	0.833
2005	0.783
2006	0.604
2007	0.568
2008	0.659
2009	0.669
2010	0.757
2011	0.549
2012	0.644
2013	0.671
2014	0.598
2015	0.611
2016	0.635
2017	0.629
2018	0.618
2019	0.598
2020	0.579
2021	0.564
2022	0.549