2007

6.0

2003

6.9

2008

5.2

2002

6.3

2003

6.1

2010

6.4

2010

6.2

2005

7.8

2023

6.5

2012

7.3

2009

5.7

2012

5.3

1989

7.1

1965

6.3

2015

7.4

1923

8.5

1973

7.3

2007

6.3

2010

7.8

2018

6.0