66% (2001)

48% (2006)

60% (2005)

56% (2005)

60% (2001)

0% (1980)

49% (2005)

58% (1984)

0% (1990)

0% (1993)

8% (1982)

0% (1984)

40% (1986)

70% (1997)

58% (1975)

0% (1969)

0% (1988)