57% (1993)

60% (2004)

66% (1994)

60% (1982)

70% (2003)

56% (2005)

63% (1971)

83% (1981)

71% (1992)

72% (2002)

57% (1991)

70% (1995)

55% (1999)

25% (2003)

50% (1995)

57% (1990)

0% (1984)

56% (1990)

42% (1998)

0% (1991)