49% (2009)

53% (1990)

38% (2001)

43% (2002)

61% (2003)

34% (1999)

44% (2006)

44% (1990)

51% (2003)

31% (2000)

69% (2000)

49% (2005)

74% (2001)

42% (2004)

33% (2004)

30% (1991)

40% (1990)