50% (2006)

70% (1994)

61% (2009)

52% (1991)

53% (2010)

70% (1990)

62% (1987)

73% (1992)

68% (1998)

58% (2009)

53% (1999)

67% (1976)

72% (1999)

53% (2014)

63% (1989)

62% (1987)

80% (1984)

65% (2000)

40% (1998)

65% (1987)