57% (2002)

0% (1979)

0% (1975)

80% (1999)

0% (1974)

61% (2000)

51% (1981)

60% (1987)

37% (2002)

10% (1991)

40% (1998)

63% (1972)

64% (2004)

55% (2006)

57% (1999)

0% (2000)

44% (1985)

63% (1975)

0% (2001)

53% (1999)