1997

6.1

2015

7.8

1965

6.8

2009

7.1

1971

6.8

1971

7.4

2009

6.7

2004

10.0

2008

8.5

2014

5.8

1956

6.5

2013

7.2

2003

8.0

2011

6.5

2010

6.8

1997

7.4

2016

5.9

2004

7.5

1965

8.0

2008

7.3