2017

6.9

2006

7.0

2003

6.8

1998

7.3

2003

6.7

1994

7.1

2001

6.0

1997

5.9

1980

7.0

1995

5.8

2022

7.3

2004

6.0

1985

6.5

2005

6.2

2008

6.1

1981

6.7

1972

5.8

1982

4.6

2023

5.0

2007

5.8