2004

6.2

2002

6.2

2011

7.3

1999

8.5

2012

6.8

2002

8.4

2009

7.9

2012

8.0

2011

8.7

2007

6.2

2009

8.6

2010

7.4

2020

8.4

2012

7.0

1967

0.0

1983

7.6

2017

7.9

2017

8.0

2017

7.1

2000

8.2