Year	Percent
1996	0.8
1997	0.8
1998	0.7
1999	0.7
2000	0.66895
2001	0.69233
2002	0.79546
2003	0.82185
2004	0.84416
2005	0.80164
2010	0.28609
2011	0.31294
2012	0.2814
2013	0.32828
2014	0.21112
2015	0.22789
2016	0.30702
2017	0.2747
2018	0.23499
2019	0.22096
2020	0.25549
2021	0.29705