50% (1996)

70% (1993)

20% (1984)

48% (1971)

50% (1988)

53% (1972)

0% (1969)

30% (1979)

55% (1978)

50% (1979)

69% (1977)

50% (1996)

40% (1995)

43% (1991)

53% (2001)

47% (2004)

0% (1993)

70% (1983)

55% (1990)

35% (1981)