1939

7.6

2001

7.9

2002

7.7

2004

8.0

2005

7.8

2007

7.7

1940

7.4

2009

7.7

1983

6.0

2016

4.2

1981

6.9

1943

6.5

1983

5.5

1993

6.5

1984

6.1

1995

5.8

1963

7.2

2016

5.8

2003

5.6

2023

6.5