46% (1968)

50% (1995)

61% (1996)

68% (1995)

60% (1993)

55% (1994)

59% (1994)

37% (1990)

63% (1964)

44% (1989)

54% (1995)

60% (1992)

53% (1994)

50% (1991)

35% (1993)

53% (1991)

0% (1993)

10% (1993)

60% (1986)

0% (1994)