68% (2005)

60% (2004)

63% (2009)

40% (2002)

63% (2004)

50% (1998)

55% (1991)

29% (2009)

28% (1990)

64% (2007)

44% (1995)

55% (1999)

51% (1993)

69% (1993)

49% (2002)

30% (2003)

0% (1990)

70% (1998)

47% (1993)

35% (1993)