57% (2009)

56% (2005)

60% (2014)

48% (2006)

54% (2007)

52% (1999)

56% (2002)

61% (2002)

64% (1997)

63% (1996)

63% (1997)

54% (1996)

64% (2004)

61% (2000)

53% (1998)

66% (2001)

57% (1998)

52% (1998)

58% (1998)

65% (2000)