Year	% net
1971	54.29018
1972	53.46788
1975	57.77708
1979	60.11218
1983	64.19606
1984	65.41728
1988	56.48755
1991	54.07675
1992	53.1399
1993	52.48012
1994	52.64684
1995	55.95531
1999	35.88598