48% (1995)

35% (1993)

44% (2011)

53% (1991)

43% (1994)

35% (1988)

40% (1996)

49% (1991)

46% (1987)

41% (2004)

24% (1997)

45% (1994)

50% (1990)

36% (1995)

48% (1995)

58% (1995)

54% (1993)

46% (1995)

40% (1991)

31% (2001)