2009

5.6

2013

6.3

2002

6.1

2003

5.8

1981

5.8

1967

6.6

2004

5.9

1997

6.6

2013

7.0

1980

8.4

2001

6.1

1970

6.1

2008

7.8

1983

7.3

2012

7.3

2009

8.0

2015

5.5

2010

6.8

1999

8.4

2012

8.2