Year	% of total
1995	100
1999	91
2000	98
2002	100
2003	100
2004	100
2005	100
2006	100
2007	100
2008	100
2009	100
2011	100
2012	98.9
2013	98.6
2014	99.8
2015	99
2016	99.1
2018	99
2019	98
2020	98.4