2012

6.7

2014

6.2

2007

6.0

2000

7.2

2013

6.7

1965

6.8

1995

5.7

1998

5.9

2008

4.8

2005

5.2

1994

6.8

2007

6.1

1973

5.7

1996

7.4

2012

6.9

1993

7.1

2001

6.7

2003

6.2

2012

7.2