1984

7.1

2009

8.5

2007

7.5

2006

6.2

1956

7.1

2008

6.8

2019

7.7

2013

8.3

2010

5.3

2021

6.2

2011

9.5

2013

8.4

1980

6.7

1999

5.2

1978

6.9

2014

7.4

1983

6.7

2001

8.9

2010

6.4

2022

3.8