Year	Percent
1991	1.762
1992	1.536
1993	1.704
1994	1.653
1995	1.655
1996	1.625
1997	1.28
1998	1.043
1999	1.182
2000	1.409
2001	1.476
2002	1.409
2003	1.54
2004	1.206
2005	0.568
2006	0.412
2007	0.446
2008	0.46
2009	0.474
2010	0.458
2011	0.479
2012	0.539
2013	0.524
2014	0.529
2015	0.453
2016	0.438
2017	0.404
2018	0.403
2019	0.403
2020	0.403
2021	0.403
2022	0.403