Year	% net
1992	29.11171
1994	32.91022
1995	34.33193
1996	36.58888
1997	37.35682
1999	45.23594
2000	52.87175
2001	55.98924
2002	64.29436
2003	72.44337
2004	77.97488
2005	82.46788
2006	83.71832
2007	77.29299
2008	72.48675
2009	67.39935
2010	62.77906
2011	65.78386
2012	67.71657
2013	64.40639
2014	63.25635
2015	59.76386
2017	51.75237
2018	51.45515