2008

5.5

2010

4.6

1941

8.0

2009

7.6

1999

8.4

1987

7.3

2001

8.5

2004

7.3

1999

7.3

2001

6.7

1975

8.4

1998

8.2

2016

7.4

1982

7.9

2014

8.4

2014

8.1

2017

7.4

2017

7.0

2017

7.6

2019

8.5