65% (2008)

63% (2001)

71% (2001)

70% (2006)

60% (1999)

56% (2006)

58% (2004)

55% (2003)

57% (2000)

73% (2000)

72% (2005)

63% (2000)

57% (2008)

67% (1995)

62% (2000)

40% (1996)

75% (1989)

70% (1978)

52% (2008)

55% (1999)