54% (2006)

75% (2007)

43% (2002)

47% (2005)

42% (2004)

38% (2001)

46% (2004)

61% (2003)

34% (1999)

51% (2003)

43% (2005)

53% (2006)

44% (2006)

33% (2004)

31% (2000)

59% (2006)

70% (2007)

61% (2010)

40% (2004)

0% (2005)