1996

8.0

2019

8.7

2005

9.7

1999

7.0

2010

7.7

2004

5.9

1996

7.5

2011

5.7

2008

5.7

2009

7.3

2017

7.2

1957

7.2

1997

6.3

1998

7.0

2024

6.9

2015

8.0

2024

7.1

2013

5.8

6.6

1975

7.9