44% (2010)

42% (1996)

0% (1986)

60% (2006)

0% (2002)

0% (1985)

0% (1980)

60% (2002)

10% (1988)

70% (2005)

62% (2006)

80% (2003)

60% (2007)

0% (1985)

0% (1982)

0% (1992)

0% (2011)

35% (2006)

48% (1988)

50% (1992)