57% (1998)

64% (1990)

57% (2000)

55% (1989)

48% (1994)

40% (1987)

40% (1986)

68% (1996)

60% (1984)

61% (1984)

50% (1986)

61% (2005)

66% (1990)

80% (1994)

60% (1990)

0% (1987)

52% (1987)

54% (1998)

85% (1990)

40% (1995)