2015

7.4

2004

7.9

2011

7.2

2008

8.9

2005

8.1

2015

7.6

2011

7.0

2014

7.3

2003

7.2

2003

7.1

2002

7.5

2016

6.9

2013

6.9

2010

7.2

2023

8.5

2010

8.1

1999

7.7

1981

8.0

1984

7.8

1980

8.3