64% (2005)

56% (2007)

71% (2004)

31% (1999)

51% (2006)

46% (2004)

55% (2006)

41% (2002)

42% (2005)

59% (2007)

47% (2004)

60% (2004)

53% (2006)

32% (2003)

57% (2007)

58% (2006)