2004

7.9

2010

6.8

2018

5.2

1949

6.2

2014

7.6

2007

7.3

2006

7.4

2009

6.2

1999

7.2

2016

5.3

1993

5.4

2013

8.1

2018

6.7

2008

6.6

2011

6.5

1987

4.9

2011

7.3

2021

5.5

2011

3.5