2014

8.8

2011

8.5

2010

8.1

1999

7.4

2008

8.9

2021

7.8

2016

8.5

2019

8.5

1994

8.4

2013

8.7

1999

8.6

1990

6.9

2007

7.9

2017

8.2

1997

8.4

2010

8.5

2021

8.2

2017

8.1

2006

7.5

1989

8.3