2007

7.9

2012

5.7

2005

6.5

2018

8.0

2014

8.4

2016

6.7

2012

7.8

2016

7.6

2019

7.5

2007

7.8

2004

6.4

1994

8.7

2006

8.2

2008

8.5

2014

7.9

1991

8.3

1997

7.9

2013

6.3

2012

7.7

1999

8.4