Year	Percent
1990	1.72774
1991	1.67706
1992	1.62795
1993	1.58559
1994	1.54593
1995	1.63812
1996	1.56646
1997	1.42224
1998	1.3508
1999	1.28497
2000	1.284
2001	1.22812
2002	1.17672
2003	1.12867
2004	0.98511
2005	0.94613
2006	0.90878
2007	0.87296
2008	0.83877
2009	0.84647
2010	0.81339
2011	0.7817
2012	0.75199
2013	0.72388
2014	0.6911
2015	0.95017
2016	0.91537
2017	1.19153
2018	0.86728
2019	1.12466
2020	1.12735