2013

5.0

1999

5.1

2004

5.9

2009

4.6

1990

6.1

1975

4.5

1949

6.2

2011

7.5

2015

6.4

2021

9.2

2017

6.9

2012

6.4

2011

9.5

2014

5.9

2017

8.1

1996

8.1

2008

5.7

2004

10.0