2005

6.3

2022

4.3

2002

6.4

2003

3.8

1992

5.0

2008

6.8

1989

6.0

2004

3.8

2021

3.6

1998

5.8

1987

5.5

2001

5.4

1982

4.5

1991

5.8

2011

5.3

2011

5.6

2015

6.5

1983

4.0

1987

0.0

2017

6.7