61% (1966)

70% (1996)

67% (1998)

62% (1999)

72% (2014)

73% (1987)

78% (1990)

60% (1994)

72% (1999)

62% (1993)

35% (1981)

65% (1993)

44% (2008)

62% (1984)

71% (1993)

69% (1995)

61% (2004)

62% (1988)

71% (2002)

53% (2000)