36% (1995)

56% (1996)

59% (1982)

48% (1984)

55% (2001)

61% (2006)

57% (1992)

51% (1994)

55% (1989)

0% (1970)

53% (1987)

42% (1984)

68% (1996)

63% (1990)

60% (1992)

61% (1989)

43% (1993)

45% (1997)

78% (2007)

58% (1992)