Year	% of total secondary
1998	95.2313690185547
1999	95.613410949707
2000	95.7317199707031
2001	95.8950729370117
2002	96.0528030395508
2003	95.9158325195312
2004	95.6867828369141
2005	95.9918365478516
2006	95.8242874145508
2007	95.6310424804688
2008	95.267578125
2009	95.3250427246094
2010	95.1145782470703
2011	94.7914962768555
2012	94.4574432373047
2013	94.5916900634766
2015	94.4330291748047
2016	94.041259765625
2017	93.8996276855469