56% (2000)

60% (2008)

63% (1999)

57% (1986)

61% (1999)

60% (2004)

54% (1995)

51% (2008)

58% (2003)

69% (1999)

59% (2000)

61% (2000)

53% (1997)

50% (1991)

77% (1998)

56% (1986)

60% (1984)

67% (2000)

55% (1998)

56% (1997)