Year	Percent
1991	1.77
1992	1.801
1993	1.833
1994	1.773
1995	1.508
1996	1.542
1997	1.475
1998	1.346
1999	1.321
2000	1.264
2001	1.032
2002	1
2003	0.926
2004	0.923
2005	0.92
2006	0.995
2007	0.95
2008	0.939
2009	0.976
2010	0.963
2011	0.902
2012	0.995
2013	0.977
2014	0.912
2015	1.023
2016	1.005
2017	0.992
2018	0.966
2019	0.95
2020	0.938
2021	0.924
2022	0.911