1940

7.3

2008

5.5

2003

6.1

2009

6.6

1998

6.5

1976

5.6

1981

6.4

1996

6.8

1972

6.9

2004

5.9

2024

8.0

1967

7.5

1950

6.8

1975

5.9

2007

6.6

2020

5.5

1990

2.5

1977

6.5

1988

7.7

2007

5.6