Year	Percent
1990	1.923
1991	1.905
1992	1.923
1993	2
1994	1.942
1995	2.1106
1996	1.4066
1997	1.5152
1998	1.5158
1999	1.0975
2000	0.5884
2001	0.8536
2002	1.4003
2003	1.1778
2004	0.8883
2005	1.1824
2006	0.9149
2007	0.8161
2008	0.8622
2009	0.5719
2010	0.9118
2011	1.1009
2012	0.8715
2013	1.1416
2014	1.0453
2015	1.5195
2016	1.2262
2017	0.938