2000

7.0

2011

6.6

2007

6.4

1980

8.4

2007

5.6

2018

6.6

2002

6.4

2009

6.6

1941

7.0

2013

6.3

1998

7.8

1951

7.2

2013

6.4

2007

5.6

1996

6.8

2002

7.3

2014

6.5

1998

7.9

2004

5.7

2006

6.7