69% (1996)

60% (1976)

0% (2006)

0% (2010)

67% (2004)

60% (1991)

0% (2003)

50% (2001)

40% (1988)

0% (2002)

0% (1998)

0% (1964)

92% (1993)

0% (1990)

70% (1974)

0% (2007)

0% (1989)

0% (2000)

0% (1963)

80% (1997)