1992

6.4

1989

7.2

1995

6.8

1987

6.0

1995

5.8

2006

6.1

1988

6.8

2004

5.3

1992

7.4

2001

5.9

1985

6.4

2009

7.1

1990

10.0

2010

2.0

2002

5.4

2000

6.5

1999

5.5

1985

5.3

1999

6.9

1992

6.5

2000

6.8

1992

0.0

2002

6.9