53% (2005)

60% (2009)

60% (2010)

67% (2010)

52% (1999)

45% (1999)

62% (2001)

53% (2003)

61% (2005)

70% (1996)

50% (1990)

43% (2002)

52% (2008)

100% (1997)

46% (1995)

63% (1996)

47% (1995)

62% (2003)

67% (1990)

43% (1998)