0% (1990)

80% (1993)

48% (1995)

75% (2013)

30% (1999)

50% (1991)

60% (1987)

10% (1983)

41% (2001)

60% (1995)

70% (1988)

0% (1993)

60% (1993)

59% (2003)

80% (1997)

48% (2002)

60% (2004)

61% (1992)

64% (2004)

70% (1993)