2002

8.4

2018

7.1

2021

7.5

2009

7.5

2001

7.5

1957

8.0

1995

5.9

2016

6.1

2020

7.0

2006

5.0

2009

4.0

2006

6.9

2015

5.5

1977

6.6

1967

6.2

1987

7.8

2011

6.3

1997

4.6

2013

5.9

2000

7.1