55% (1997)

42% (1998)

44% (2000)

45% (1997)

30% (2000)

56% (2000)

45% (2006)

44% (1997)

30% (2008)

55% (2000)

20% (2009)

70% (2003)

34% (2001)

57% (1998)

42% (1997)

20% (2008)

15% (2009)

0% (2009)

30% (2000)

20% (1997)