64% (2005)

56% (2004)

63% (1996)

60% (2006)

67% (2003)

72% (2003)

46% (2005)

51% (2010)

43% (2005)

43% (1998)

55% (1990)

55% (1997)

38% (1992)

50% (1990)

52% (2009)

47% (1989)

52% (1997)

61% (1996)

62% (2003)

55% (2002)