7.0

2009

7.4

2007

7.9

2003

8.2

2014

7.8

1973

8.0

2017

7.3

2010

8.1

2011

7.1

1994

8.4

2015

7.5

1989

8.0

2007

8.5

2002

8.3

2001

8.2

2006

7.8

2013

8.2

2011

8.3

2019

8.5

2016

8.4