35% (1998)

68% (1996)

43% (2001)

59% (1996)

43% (2006)

52% (1999)

59% (2010)

54% (2006)

54% (1993)

55% (1994)

62% (2000)

68% (1995)

65% (2012)

63% (2001)

52% (1997)

65% (2000)

43% (1994)

52% (2010)

64% (2014)

54% (1998)