Year	% of total
1995	93
1997	95
1998	94
2000	82.9
2001	93.8
2003	94
2004	95.9
2005	96.7
2006	96.6
2007	80.9
2008	96
2009	87.4
2012	97.3
2013	98.3
2014	85.7
2015	95.8
2016	94.3
2017	96.7
2018	95.1
2019	95
2020	97.6