1992

6.2

2006

5.5

2007

6.9

2010

4.4

1978

7.5

1981

5.9

2016

6.0

2012

6.2

2010

7.0

1979

7.0

2009

6.2

1996

7.2

2014

6.3

2004

6.7

2020

7.4

2015

5.4

2024

7.3

2008

5.4

2011

5.3

2011

5.3