1983

2.0

1997

8.5

2006

7.1

1991

6.4

2008

6.5

2023

6.3

2018

6.9

2013

7.0

1994

6.8

1939

5.8

1998

5.4

1961

4.3

1988

6.5

1973

4.7

2007

5.0

1991

3.0

1935

0.0

2004

6.2

2014

6.2

1980

7.0