2006

6.3

2002

5.3

2008

6.1

2007

5.7

2003

6.5

1998

6.0

1985

6.2

2016

4.6

1994

6.8

1973

7.4

1961

7.5

2004

6.3

1955

7.4

2001

6.8

2005

6.6

2002

5.9

2016

0.0

1997

6.6

1993

7.2

1987

7.7