69% (1994)

68% (2002)

56% (2007)

68% (2007)

51% (2004)

57% (2009)

54% (1995)

60% (2010)

59% (2005)

60% (2005)

52% (2000)

0% (1999)

68% (1998)

0% (2007)

30% (2001)

90% (1998)

100% (1981)

60% (1994)

23% (2001)