30% (1998)

73% (2005)

60% (1990)

40% (1990)

80% (1995)

68% (2002)

0% (2001)

56% (1982)

80% (1995)

66% (2001)

68% (1992)

92% (2003)

45% (2005)

0% (1995)

60% (1990)

98% (1994)

45% (1982)

50% (1982)

75% (1981)

75% (1975)