65% (2008)

70% (2006)

59% (1999)

59% (2004)

63% (2001)

71% (2001)

63% (2000)

56% (2006)

72% (2005)

55% (2003)

73% (2000)

56% (2000)

57% (2008)

67% (1995)

75% (2006)

55% (1999)

66% (1972)

52% (2008)

100% (2000)

40% (1996)