2009

6.2

2008

7.3

1997

7.9

2015

7.9

1994

7.0

1998

8.1

2010

8.2

2010

7.8

1985

8.3

1995

8.0

2014

7.7

2013

6.9

1938

7.1

2008

8.1

2011

7.5

2002

7.1

2011

7.0

2004

7.4

2015

7.6

1953

7.2