2007

8.2

1999

7.2

2014

7.9

8.1

2014

9.5

2017

8.5

1982

7.6

2018

5.9

1898

7.1

1993

8.1

1960

8.1

2019

6.5

2018

6.8

2023

7.7

1975

6.1

2011

5.3

2020

6.6

2010

6.0

2018

6.8

2006

7.3