49% (2009)

52% (1990)

42% (2004)

44% (2006)

74% (2001)

43% (2002)

70% (2000)

38% (2001)

61% (2003)

34% (1999)

44% (1990)

47% (2005)

31% (2000)

40% (1990)

51% (2003)

73% (2007)

33% (2004)

30% (1991)