51% (1997)

49% (1996)

36% (1995)

55% (1995)

44% (2000)

48% (1995)

36% (1994)

60% (1999)

43% (1994)

49% (1995)

40% (1996)

44% (1997)

23% (1996)

35% (1996)

46% (1993)

38% (1994)

40% (1995)

32% (1992)

55% (1994)

48% (1995)