Year	Percent
1990	2.10986
1991	1.9804
1992	1.81098
1993	1.65702
1994	1.5206
1995	1.39878
1996	1.21981
1997	1.24519
1998	1.17193
1999	1.09235
2000	1.05389
2001	0.92092
2002	0.93366
2003	0.83699
2004	0.935
2005	0.81862
2006	0.7533
2007	0.77316
2008	0.78353
2009	0.72251
2010	0.66294
2011	0.6767
2012	0.63459
2013	0.66253
2014	0.70888
2015	0.62645
2016	0.65801
2017	0.63133
2018	0.64375
2019	0.64775
2020	0.70548
2021	0.62593
2022	0.61457