40% (1999)

36% (2003)

60% (1996)

35% (2007)

35% (1990)

60% (1999)

25% (2005)

53% (1999)

10% (1995)

0% (1985)

40% (2004)

66% (1995)

20% (1992)

70% (2007)

20% (1991)

0% (1984)

20% (1983)

60% (1987)

20% (1985)

100% (1992)