2009

6.2

2020

6.3

2013

6.1

5.3

2015

6.0

1985

6.9

2013

6.6

2008

8.0

1999

6.6

1977

6.7

1975

5.6

2001

4.3

2020

6.7

2020

6.3

2004

6.5

2023

6.4

2007

8.1

2008

5.9

2007

4.9

2014

7.4