Year	% of total
1995	100
1997	99.7
2000	100
2002	98
2003	99
2004	100
2005	100
2006	97.9
2007	100
2008	100
2010	98.5
2012	98.7
2014	99.1
2015	99.1
2017	100
2018	100
2019	100