Year	% net
2000	77.18935
2001	76.8489
2002	77.64558
2003	78.46796
2004	79.05276
2005	80.40966
2006	79.71016
2007	79.30047
2008	81.84019
2009	78.66838
2010	77.95972
2011	77.13215
2012	77.50429
2013	76.69038
2014	76.56104
2015	76.20263
2016	76.62379
2017	77.9212
2018	78.29615