2014

7.1

2012

7.0

2013

6.5

2007

6.4

1984

7.5

1975

6.4

2013

6.6

2013

7.8

2018

6.5

1988

6.1

2017

7.3

2014

6.1

2021

6.6

2000

7.0

2011

5.2

1993

6.8

2003

5.7

2004

6.1

2002

5.2

2009

7.2