67% (1997)

68% (1984)

60% (2016)

59% (2006)

62% (1983)

67% (2009)

61% (2003)

66% (2004)

75% (1978)

63% (1991)

51% (2005)

69% (2001)

67% (2008)

60% (1997)

65% (1981)

64% (2017)

72% (1979)

62% (2005)

65% (1993)

62% (2010)