55% (1979)

40% (2002)

0% (1976)

70% (1993)

38% (1976)

60% (1974)

56% (2001)

49% (1995)

81% (1982)

53% (1978)

60% (1996)

51% (1981)

54% (1973)

64% (2001)

34% (1998)

60% (2004)

65% (2001)

30% (1971)

0% (2000)

47% (1985)