Year	% of total secondary
1999	26.690990447998
2002	33.9199981689453
2003	32.5349617004395
2004	32.7671508789062
2005	32.8250389099121
2006	32.2274208068848
2007	25.5580806732178
2008	26.4742107391357
2009	27.1000804901123
2010	28.7023391723633
2011	29.107120513916
2015	31.1275005340576
2019	33.5800895690918
2020	34.3578910827637
2021	34.3809700012207
2022	34.9007797241211