53% (2005)

60% (2009)

46% (1997)

51% (2003)

54% (2006)

52% (2009)

52% (1999)

50% (2005)

50% (2002)

45% (2009)

33% (2004)

42% (2003)

57% (1996)

51% (1996)

57% (1999)

49% (1995)

44% (1992)

39% (2001)

58% (1996)

44% (1996)