43% (2002)

75% (2007)

42% (2004)

38% (2001)

34% (1999)

46% (2004)

61% (2003)

51% (2003)

44% (2006)

47% (2005)

33% (2004)

59% (2006)

31% (2000)

54% (2006)

43% (2005)

70% (2007)

53% (2006)

61% (2010)

40% (2004)

0% (2005)