2005

6.3

2009

6.7

2007

6.4

1999

6.5

2013

6.8

2018

8.0

2007

6.5

2011

6.7

1998

0.0

2002

6.2

1997

6.6

2016

5.2

2008

6.7

2008

7.6

1993

6.9

2022

6.0

1976

6.6

1930

6.8

2022

7.0

2017

5.9