2008

8.9

2014

8.4

2009

7.9

2018

7.0

2001

8.6

2021

7.9

1989

8.3

1998

8.2

2002

7.7

2005

7.5

1990

8.3

2018

8.0

2016

8.6

2010

8.1

2005

8.3

2004

7.9

2009

8.0

1975

8.2

2003

7.5

2014

8.3