2005

5.6

1992

6.2

2007

5.9

1962

6.0

2006

6.1

2005

4.2

1997

5.2

2007

5.7

1999

6.7

2010

7.8

2019

5.3

2002

6.1

2009

5.8

1989

5.9

1965

6.8

0.0

2009

3.2

1927

0.0

2021

2.0

1984

6.5