Year	% of total
1994	12
2000	27.3
2003	56.1
2005	52.3
2006	57.1
2007	71.4
2008	66.3
2009	66
2010	64.5
2011	70
2012	74.6
2013	89
2014	89
2015	89
2016	89
2017	96.4
2018	96.2
2019	96.3
2020	99.3
2021	98.9