72% (1972)

72% (2009)

54% (2005)

72% (2003)

47% (2004)

34% (1997)

50% (1989)

71% (1992)

57% (1993)

73% (2000)

70% (2003)

25% (1990)

73% (2002)

47% (1998)

66% (1993)

51% (1979)

63% (1975)

57% (1973)

58% (1986)

75% (2023)