10% (1991)

36% (1999)

64% (2001)

53% (1978)

55% (1994)

63% (1994)

66% (1990)

40% (1995)

68% (1979)

60% (1974)

50% (1976)

40% (1969)

0% (2002)

66% (1971)

50% (1994)

0% (1976)

42% (1987)

46% (1991)

60% (1978)

0% (1980)