71% (1992)

58% (2005)

50% (2003)

62% (2001)

52% (2009)

70% (2010)

78% (2004)

58% (2008)

59% (2002)

64% (1999)

42% (2002)

0% (2005)

0% (1999)

70% (2002)

33% (2008)

70% (1998)

38% (2000)

0% (2006)

50% (2009)

80% (2004)