2008

5.6

2003

8.7

1998

5.1

2012

6.0

2010

7.5

1969

7.3

2014

6.3

2009

6.8

1999

4.5

1999

6.5

2010

5.4

2011

5.5

2002

5.2

2015

6.8

2008

7.6

2009

5.4

2002

6.1

2009

5.5

2001

6.0

1976

6.1