1997

5.8

2019

4.7

2009

4.0

1977

6.4

1944

5.4

2000

5.5

1978

6.0

1984

4.4

1999

5.7

1998

5.4

1984

5.6

2006

6.9

2019

5.0

2009

0.0

1972

4.2

1973

6.0

1974

6.2

1940

6.2

0.0

1965

2.1