2007

5.9

1997

6.8

1961

7.5

2004

6.3

1968

5.8

2006

3.0

2005

6.2

2002

7.1

2003

6.6

2007

5.4

2014

7.0

2004

6.8

2005

5.9

1999

6.7

1992

0.0

1997

6.5

1980

6.6

1982

6.4

1994

6.8

2002

6.7