1973

5.0

2002

6.5

1981

6.1

2008

7.8

1984

5.8

2006

7.5

2019

4.0

1996

6.2

1977

5.2

1986

6.3

1996

6.5

2014

6.8

2020

0.0

2008

6.8

1989

6.8

2004

5.3

2011

6.0

2003

6.9

1976

6.2

2004

7.3