54% (2004)

70% (2003)

40% (2006)

32% (2011)

58% (2004)

50% (2002)

68% (1993)

61% (1997)

55% (2007)

68% (1994)

0% (1986)

35% (2010)

0% (1984)

0% (1995)

0% (1998)

0% (1994)

0% (1981)

0% (2005)