20% (1970)

58% (1977)

60% (1983)

66% (1984)

73% (1977)

50% (1985)

35% (1981)

80% (2001)

56% (2017)

60% (1970)

0% (2002)

10% (1997)

34% (2007)

50% (1970)

64% (1997)

40% (2011)

0% (2002)

100% (2000)

50% (1987)

50% (2001)