2014

6.8

2017

7.3

2013

7.7

1984

7.1

1966

6.1

2003

5.0

1924

7.2

2006

7.4

1994

4.6

1980

6.3

1972

7.4

2017

6.9

2006

5.9

2011

6.1

2019

8.7

2015

6.6

2017

7.7

2009

6.2

2018

6.7