70% (1996)

62% (2005)

67% (2010)

60% (2009)

60% (2010)

67% (1990)

46% (1995)

63% (2004)

60% (1991)

53% (2003)

38% (1992)

52% (2008)

47% (1995)

58% (1996)

37% (2005)

56% (2004)

47% (1989)

96% (1996)

73% (2003)

52% (2005)