61% (2009)

74% (1990)

73% (2013)

53% (2017)

72% (1998)

71% (1994)

69% (2015)

79% (2013)

68% (1991)

61% (1986)

64% (1993)

62% (1998)

59% (1990)

69% (1991)

60% (1988)

52% (1999)

46% (2007)

69% (1979)

64% (1976)

44% (1993)