Year	% net
1971	51.44103
1972	51.57135
1973	51.34122
1978	54.43943
1994	80.85954
1997	84.15564
1999	84.2703
2000	84.32374
2001	85.45946
2002	86.75323
2003	88.22327
2004	89.87591
2012	98.77074