64% (2013)

63% (1997)

62% (2007)

59% (2006)

62% (2016)

63% (1992)

55% (1986)

60% (1991)

68% (2003)

66% (2001)

59% (2014)

52% (1993)

55% (1992)

56% (2004)

76% (1995)

59% (1986)

54% (1985)

63% (1985)

38% (1995)

62% (1992)