71% (2000)

74% (1999)

71% (1999)

66% (1995)

53% (2015)

62% (2012)

75% (2009)

69% (1988)

64% (1966)

60% (1998)

61% (2012)

70% (2005)

78% (1997)

70% (1977)

41% (2003)

63% (2009)

48% (1984)

70% (2001)

78% (1982)

74% (2007)