1999

8.0

2018

7.8

2024

6.9

2017

4.2

2010

6.7

1979

5.4

1976

5.6

2010

4.4

2004

5.8

2013

5.0

1969

6.4

2011

6.3

1984

6.2

2005

7.8

2007

5.8

2006

6.4

2008

5.9

1993

7.3

2015

6.5

1999

5.9