64% (2001)

60% (2007)

45% (1994)

55% (1984)

50% (1997)

64% (1998)

59% (2003)

63% (1997)

57% (1994)

43% (1996)

69% (2000)

61% (2001)

58% (1996)

50% (1998)

38% (2004)

70% (1993)

58% (1996)

34% (1997)

42% (2002)

51% (1994)