2004

8.0

2007

7.7

2019

7.7

2009

8.5

2007

10.0

2003

5.0

2021

6.6

2016

7.0

2010

7.0

2010

7.1

2015

5.2

1975

6.3

1955

4.9

7.6

2006

6.4

2008

5.0

2014

6.8

1990

6.6