57% (1991)

51% (1975)

70% (1998)

60% (1998)

50% (1975)

50% (1972)

58% (1963)

53% (1978)

47% (1999)

66% (1988)

52% (1977)

48% (1986)

61% (1980)

51% (1970)

48% (1994)

50% (1969)

59% (1995)

57% (1964)

51% (2001)

100% (2005)