Year	% net
1971	61.04195
1990	77.12007
2000	79.50755
2001	79.37586
2002	78.99802
2003	83.57377
2007	91.12498
2008	90.8729
2009	90.65366
2010	90.95531
2011	90.37191
2012	91.57155
2013	92.25734