67% (1997)

61% (1993)

55% (1995)

58% (1999)

51% (2005)

40% (1997)

0% (1970)

67% (1995)

63% (2001)

50% (1999)

63% (1991)

62% (2002)

55% (1999)

57% (1998)

40% (2003)

51% (1989)

39% (1986)

0% (1970)

70% (2005)

22% (1988)