1977

7.4

2005

7.0

1997

6.8

2002

5.5

2001

6.2

2020

4.3

2005

6.5

1971

6.5

2021

4.0

2009

5.9

1995

8.0

1970

6.3

2023

0.0

2009

5.1

2017

5.0

2010

3.5

1984

6.8

0.0

2021

0.0

1963

7.9