2005

4.2

2005

5.1

1989

5.8

2009

4.5

1973

3.1

2007

6.1

1997

3.5

1988

5.3

1993

6.2

2016

9.0

2008

6.2

2002

5.5

2008

5.1

1985

5.2

1966

7.7

2003

5.4

1981

6.7

1999

0.0

1992

6.8

2020

7.0