55% (2005)

54% (1994)

57% (1991)

72% (1991)

48% (1994)

64% (1991)

62% (2003)

66% (1995)

67% (1993)

57% (1996)

52% (1993)

45% (1997)

59% (1991)

56% (1991)

61% (1999)

50% (2002)

35% (1999)