0% (2003)

54% (1981)

32% (1990)

67% (1979)

64% (1995)

45% (2001)

55% (1981)

51% (1976)

60% (1981)

55% (1977)

61% (1984)

60% (2002)

56% (1982)

50% (1985)

59% (1992)

60% (1992)

70% (1995)

55% (1976)

55% (1999)

58% (1989)