61% (1997)

60% (1998)

61% (2002)

56% (2003)

61% (2002)

65% (1995)

61% (1999)

70% (2003)

57% (2000)

71% (2000)

63% (2004)

36% (2001)

35% (2001)

55% (2008)

40% (2002)

50% (2005)

60% (2003)

54% (2009)

28% (2009)

42% (2004)