1997

5.0

2009

6.8

2008

5.7

2005

8.3

1964

7.0

2011

7.2

2013

5.9

1953

7.2

2011

6.9

2006

5.6

2020

7.5

2000

6.6

1942

6.8

2018

6.6

2013

6.5

2011

6.3

2022

6.3

1989

5.7

2012

7.7

1988

6.5