Year	%
1986	29.7
1993	74.2
1997	83.3
2000	79
2005	87.4
2006	91.4
2009	94
2011	93.3
2013	94.5
2014	96.2
2015	95
2016	95.9
2017	97.1
2018	97.7
2019	97.6