2010

8.1

2011

8.3

2003

6.6

2019

8.5

2017

6.9

1986

6.0

2018

5.7

2002

5.7

1992

7.0

2021

7.1

2013

7.2

2006

7.8

2004

6.4

2006

5.2

2005

6.0

2018

6.8

2019

6.2

2002

7.6

1997

7.0

2003

7.6

2000

6.8