56% (1989)

52% (1987)

77% (1998)

60% (2004)

64% (2005)

60% (2008)

66% (1998)

48% (1994)

47% (1992)

55% (1987)

60% (1990)

60% (1991)

42% (1998)

0% (1986)

58% (1995)

61% (1984)

68% (1988)

60% (1988)

67% (2001)

85% (1990)