45% (1976)

50% (1983)

60% (1991)

0% (2006)

65% (2015)

100% (2001)

0% (1999)

0% (1972)

50% (1978)

55% (1979)

0% (1989)

0% (1990)

0% (2007)

50% (1984)

60% (1992)

75% (1979)

60% (1982)

87% (1992)

80% (1983)

10% (2007)