2007

9.5

2001

7.2

2008

7.2

2004

8.3

1985

6.5

1987

7.8

1978

7.2

1977

7.4

2010

7.5

2019

7.2

2012

6.9

2014

8.2

2013

6.7

1987

7.5

2008

7.5

2017

7.2

2009

7.0

2020

7.6

2000

7.1

2016

6.6