56% (1994)

68% (1990)

72% (1993)

69% (2011)

57% (1993)

65% (1992)

64% (1991)

64% (1995)

45% (2003)

46% (2002)

65% (2000)

72% (1984)

70% (1986)

53% (1998)

61% (1997)

59% (1993)

64% (1989)

69% (1994)

62% (1988)

61% (1985)