51% (2012)

53% (2000)

55% (2002)

45% (2004)

37% (2002)

61% (2011)

46% (2001)

48% (2001)

35% (1998)

50% (2004)

64% (2009)

52% (2003)

58% (1999)

55% (2005)

48% (1999)

52% (2002)

59% (2007)

49% (1999)

46% (1997)

50% (2004)