Year	% net
1971	11.71712
1980	22.00323
1983	23.82748
1984	20.66145
1985	21.5357
1986	22.67381
1987	24.69305
1989	25.7447
2000	37.84051
2001	39.76658
2002	42.20082
2004	44.52692
2005	47.36928
2006	49.42487
2010	52.40421