92% (1993)

40% (1988)

0% (1998)

63% (1996)

60% (1991)

0% (2002)

70% (1974)

45% (2001)

67% (2004)

0% (2007)

0% (1964)

0% (2008)

60% (1976)

85% (2008)

0% (2006)

0% (1990)

80% (2001)

0% (2007)

80% (1990)

0% (1995)