2011

7.2

2019

7.7

2010

7.5

2018

8.3

2006

6.2

2012

7.3

1984

7.1

2016

4.9

1966

6.1

2016

5.9

1989

5.1

2008

6.8

1984

9.2

2017

5.8

2015

5.9

1989

6.5

2011

6.1

2008

8.1

1970

6.3

1971

7.1