2005

6.9

2004

7.0

1966

7.1

1991

5.3

2002

4.6

1992

7.1

1958

7.8

2008

6.7

2019

5.7

2008

7.0

2010

7.1

1996

6.3

2016

6.6

2011

6.5

2000

5.2

1984

6.3

1967

6.2

2014

5.7

2018

8.1

2001

5.8