59% (1994)

62% (1994)

63% (1988)

40% (2002)

37% (1976)

67% (1975)

61% (2000)

52% (1990)

57% (2002)

45% (2005)

65% (1973)

72% (1975)

47% (1999)

51% (1981)

47% (1996)

80% (1999)

57% (1978)

60% (2004)

64% (2001)

55% (1980)