1968

6.4

1967

6.5

2023

6.5

2004

7.5

2018

6.0

2005

7.2

2011

6.9

2010

6.7

1999

6.2

2009

6.6

1966

6.5

2011

6.5

2023

6.9

2008

6.7

2003

7.3

1972

4.0

2003

5.3

1947

6.3

1991

5.3