0% (1970)

80% (1995)

60% (1985)

73% (1977)

72% (1977)

10% (1993)

50% (1985)

60% (1990)

0% (1993)

75% (1975)

98% (1994)

50% (1982)

0% (1970)

50% (1978)

60% (2001)

53% (2006)

0% (1970)

0% (2004)

40% (1970)

50% (1979)