70% (2003)

54% (2004)

35% (2011)

50% (2002)

40% (2006)

68% (1994)

35% (2010)

58% (2004)

68% (1993)

0% (1994)

61% (1997)

0% (1984)

55% (2007)

0% (1998)

0% (1986)

0% (2005)

0% (1995)

0% (1981)