51% (2002)

43% (1999)

55% (2000)

61% (1997)

52% (1994)

62% (2001)

57% (2003)

54% (2011)

36% (2011)

62% (2009)

46% (2005)

54% (2015)

55% (2006)

37% (2005)

52% (2008)

61% (2008)

63% (1999)

61% (1998)

46% (2002)

50% (2000)