Year	% of total primary
1999	82.9375534057617
2000	82.4462890625
2001	80.8923263549805
2002	80.6808929443359
2003	80.236442565918
2004	79.5876312255859
2005	79.248779296875
2006	78.7873001098633
2007	77.8465118408203
2008	77.1574096679688
2009	75.0100631713867
2010	74.0211029052734
2011	75.8450393676758
2012	74.4711990356445
2013	73.0082626342773
2014	73.4209518432617