68% (2005)

64% (2007)

62% (2009)

40% (2003)

51% (1993)

60% (1992)

60% (2004)

61% (2004)

29% (2009)

0% (2002)

40% (2002)

46% (1998)

47% (2002)

0% (2005)

40% (1999)

70% (1998)

49% (1992)

67% (1993)

48% (1996)

47% (1993)