1998

7.2

2000

6.5

1999

6.7

1958

6.6

1965

7.2

2004

6.1

2007

7.5

1946

4.8

1917

0.0

2020

6.7

1986

0.0

1987

4.0

1939

7.2

1948

8.0

1964

7.2

1974

7.5

1953

7.4

1955

7.9

1969

7.5

1970

5.8