68% (2005)

61% (2004)

17% (2003)

62% (2009)

64% (2007)

29% (2009)

40% (2002)

46% (1998)

0% (2002)

51% (1993)

47% (2002)

40% (1999)

70% (2005)

47% (1993)

44% (1995)

0% (2005)

60% (1992)

60% (2004)

29% (2006)

45% (1999)