70% (1980)

35% (1996)

5% (1975)

57% (1991)

63% (1989)

47% (1999)

60% (2005)

10% (1999)

65% (1995)

0% (1989)

10% (1973)

55% (1980)

63% (1976)

40% (1982)

57% (1982)

30% (1995)

46% (1999)

0% (1980)

0% (1988)

10% (1977)