47% (1995)

46% (2011)

49% (1991)

45% (1994)

47% (1987)

25% (1997)

54% (1993)

40% (1994)

32% (1996)

30% (1995)

31% (2001)

34% (1993)

43% (1991)

37% (1995)

37% (1988)

54% (1995)

42% (1989)

33% (2005)

41% (2004)

57% (1991)