2013

8.2

2020

8.2

2009

7.7

2011

8.5

2019

8.7

1977

7.3

2011

7.6

1995

8.2

2005

7.6

2013

7.7

2018

8.2

1996

6.8

1995

7.0

1999

8.4

1988

8.0

1985

7.7

2015

7.6

2009

7.9

1997

7.4

2005

8.1