62% (1995)

64% (1997)

39% (1990)

51% (1991)

72% (2012)

44% (1994)

36% (1997)

67% (1987)

55% (1993)

43% (1999)

40% (1998)

49% (1998)

56% (1999)

45% (2000)

30% (1992)

50% (1999)

67% (1999)

43% (1990)

30% (1991)

30% (1999)