87% (2007)

0% (2001)

50% (2008)

70% (1990)

0% (2001)

80% (1996)

70% (1991)

80% (1993)

0% (1999)

80% (1990)

0% (1991)

0% (1988)

70% (1995)

80% (1996)

0% (1988)

70% (1991)

70% (1999)

80% (1995)

80% (1993)

0% (1993)