1978

6.8

1922

5.0

2006

5.8

2007

7.9

1994

6.2

2013

7.2

1994

5.8

2018

6.8

1992

6.9

2006

6.1

2003

7.4

2008

6.5

2022

7.0

2023

7.8

2009

7.0

2015

6.0

1989

6.6

1984

0.0

2012

7.0

1971

8.0