2007

8.6

2009

6.6

1977

6.7

1972

7.3

2001

5.2

2021

7.5

2008

8.7

2013

6.9

2012

6.2

2005

6.0

2006

6.9

2007

6.3

2008

7.5

2001

8.9

1984

6.3

2010

5.1

2002

4.6

2004

6.7

1979

6.8

2007

9.9