57% (1996)

53% (1994)

59% (1991)

56% (1991)

72% (1991)

62% (1991)

50% (1994)

68% (1995)

69% (1993)

62% (2003)

35% (1999)

50% (2002)

61% (1999)

52% (1993)

56% (1991)

46% (1997)

55% (2005)