1988

7.1

1997

6.0

1995

6.2

2002

5.6

2000

4.9

1982

6.2

1995

6.9

1980

2.0

2017

6.5

2015

6.3

2023

7.2

1945

3.0

2018

6.7

1976

6.2

2023

8.1

0.0

1992

2.0

1993

1.0

2012

6.4

2005

4.2