2004

6.5

2010

7.5

2018

6.4

2020

6.2

1973

7.2

2013

7.1

1967

7.4

2013

6.6

2012

6.2

2000

7.9

2020

4.7

1897

6.2

1971

7.1

2021

7.1

2011

7.8

2015

4.6

2005

7.2

2020

6.8

1975

7.3

1977

5.8