1963

7.8

2006

8.4

2009

8.0

1998

7.5

2010

8.1

2016

7.7

2019

8.5

2018

7.4

2013

7.3

2015

6.2

2017

7.0

2010

7.8

2023

8.8

1999

6.7

2019

8.5

2012

8.6

2018

7.3

1966

7.2

1998

6.9

2012

7.8