71% (1986)

54% (1992)

65% (1997)

65% (2000)

64% (1995)

79% (2002)

72% (2004)

70% (1994)

70% (1993)

67% (2008)

74% (1973)

72% (1991)

54% (2016)

68% (2021)

62% (1993)

73% (2003)

62% (1991)

51% (1992)

73% (2004)

64% (2009)