1989

5.6

2004

5.5

1987

5.8

2014

7.0

1995

3.1

1997

7.5

2012

6.2

1989

5.4

1996

3.0

2003

7.5

1983

5.2

1984

5.5

1985

7.2

2005

7.1

2000

6.0

1988

0.0

2005

6.3

1990

6.1