2008

7.8

2013

7.2

2008

5.9

1988

6.0

2014

7.8

2011

7.6

2007

7.5

1982

7.9

2000

7.1

2017

6.3

2016

7.8

2015

7.0

1968

6.6

2009

6.7

1941

7.3

2014

7.5

1943

8.2

2000

8.1

2012

6.9

1985

8.3