64% (1998)

63% (2008)

66% (1997)

67% (2002)

58% (2011)

66% (2009)

53% (2006)

64% (2007)

63% (2001)

68% (2011)

54% (1994)

69% (2000)

58% (2005)

53% (2000)

62% (2016)

37% (2001)