2018

8.5

2010

7.0

2017

9.4

2001

4.3

1992

6.2

2020

6.4

1996

9.5

1998

4.8

2008

5.2

2012

5.6

2011

5.8

2003

7.6

2009

7.3

2006

7.0

1974

7.0

2009

7.6

1990

6.1

2009

3.6