57% (1992)

65% (2004)

68% (1991)

58% (1996)

35% (1996)

30% (1979)

65% (1985)

70% (1997)

47% (1982)

60% (2004)

64% (1987)

45% (2002)

0% (1967)

45% (2002)

42% (1996)

37% (2000)

38% (1998)

55% (1999)

70% (1986)

30% (1989)