57% (1992)

70% (1995)

40% (1998)

49% (2008)

58% (2005)

45% (2006)

68% (1952)

44% (1999)

38% (2005)

35% (2000)

63% (2003)

42% (1991)

80% (2008)

60% (1998)

0% (2003)

47% (1987)

60% (1964)

55% (1978)

0% (2003)

46% (2008)