61% (1997)

45% (2003)

56% (2005)

67% (1998)

56% (1983)

47% (2007)

45% (1983)

59% (1999)

58% (2003)

48% (1998)

58% (1998)

58% (1995)

50% (1997)

25% (2000)

51% (1999)

47% (2007)

51% (1998)

55% (1997)

0% (1970)

0% (1970)