70% (2003)

40% (2006)

54% (2004)

32% (2011)

58% (2004)

50% (2002)

68% (1993)

68% (1994)

55% (2007)

61% (1997)

35% (2010)

0% (1995)

0% (1986)

0% (1984)

0% (1981)

0% (1998)

0% (2005)

0% (1994)