2003

8.2

2012

6.8

1992

5.8

2015

7.4

2006

6.2

2009

6.1

2021

7.3

1998

8.7

2001

7.2

1997

7.5

2015

8.3

1993

6.6

1998

7.2

2004

8.6

2010

7.5

2009

8.3

2020

8.4

2008

7.6

2016

7.8

2008

7.8