Year	Percent
1990	1.18986
1991	1.24597
1992	1.30398
1993	1.2344
1994	1.40477
1995	1.39694
1996	1.46296
1997	1.3709
1998	1.38993
1999	1.3674
2000	1.35882
2001	1.35807
2002	1.33302
2003	1.14866
2004	1.18668
2005	1.17754
2006	1.20294
2007	1.19085
2008	1.17824
2009	0.93163
2010	0.93254
2011	0.9282
2012	0.92566
2013	0.93063
2014	0.92927
2015	0.92228
2016	0.89802
2017	0.92038
2018	0.91643
2019	0.97867
2020	0.79969