1975

8.0

1981

9.2

2004

5.9

2016

5.8

1988

5.3

2010

7.0

2024

9.9

2008

6.8

1973

5.0

2013

7.7

2011

6.0

2012

6.3

2014

6.6

1986

3.6

2012

6.0

2015

5.7

2020

5.5

2010

5.2

1972

6.2

2018

5.6