50% (1977)

59% (1992)

45% (1984)

0% (1987)

10% (1989)

63% (1976)

100% (1987)

10% (1973)

35% (1996)

60% (2005)

35% (2006)

30% (1995)

0% (1999)

63% (1989)

48% (1986)

60% (1991)

47% (1999)

25% (1999)

10% (1999)

10% (1996)