75% (1988)

60% (1989)

64% (2002)

78% (1987)

60% (1979)

70% (2000)

40% (1998)

60% (1983)

20% (1999)

62% (2005)

72% (2005)

0% (1987)

73% (1993)

60% (2006)

0% (1974)

0% (1999)

0% (1966)

70% (2007)

67% (2004)

0% (1997)