1974

6.5

1982

5.7

2010

8.2

1971

7.0

2009

6.9

2006

6.4

2013

6.3

2013

8.1

2023

7.0

2013

5.9

1990

5.5

2008

7.5

1966

7.8

1985

6.9

2010

6.0

2024

6.8

2023

6.6

2002

8.4

2016

4.2

2005

6.6