0% (1975)

40% (1969)

51% (1981)

60% (2004)

58% (1996)

50% (1992)

50% (1993)

55% (2006)

57% (1999)

44% (1985)

70% (1984)

53% (1978)

40% (2002)

60% (1996)

0% (1979)

10% (1991)

0% (1974)

40% (2000)

60% (1978)

76% (1989)