67% (2003)

68% (2007)

60% (1997)

67% (2000)

46% (2004)

100% (1996)

68% (2004)

58% (2004)

60% (2006)

53% (2000)

38% (2011)

51% (2005)

62% (2009)

67% (2002)

68% (1991)

59% (2001)

51% (2003)

59% (1993)

54% (2012)

52% (2001)