2004

6.4

1995

8.0

1999

7.6

2003

7.8

1961

7.2

2008

7.3

2015

7.9

1994

7.0

2012

5.9

1938

7.1

2010

7.8

2018

7.5

2007

6.4

2018

8.2

1997

7.9

2011

7.0

2017

8.1

2001

7.9

1953

7.2

2017

7.3