1996

6.4

2002

4.9

1997

7.2

2004

7.9

1990

6.9

1995

5.2

2015

7.1

2005

8.2

2013

7.1

2005

7.5

2009

7.5

2011

6.3

2009

7.3

2017

8.0

2016

7.9

2013

7.3

2010

6.9

2021

8.3

2012

5.5

2021

6.6

2021

7.1

1994

8.0

1994

7.2

2005

7.5

1998

6.8