2004

5.7

1990

5.7

2006

4.0

1968

3.6

2005

5.6

1993

5.3

1995

3.7

2000

6.2

1984

3.5

2009

4.8

1989

4.2

2008

3.0

1987

4.8

2009

0.0

1998

5.5

1984

6.2

1985

6.0

2019

4.2

2016

6.0

2021

5.0