1967

7.8

2012

8.1

2019

7.3

1955

6.6

2012

6.7

2000

6.9

2003

8.2

1955

7.7

2010

7.1

2005

7.9

2004

7.3

2018

6.7

2010

8.2

2009

6.4

2007

7.5

2013

8.0

1989

7.8

2021

5.9

1995

7.3

2015

6.9