2019

8.7

2011

8.2

2009

7.5

1973

6.8

2006

8.6

2016

7.8

2013

8.2

2011

7.6

2001

7.8

2004

8.1

1988

8.0

1990

6.9

2005

8.6

1982

7.5

2005

7.6

1995

8.2

2013

8.0

2015

7.7

2016

8.0

1986

8.4