1973

7.4

1943

7.1

1983

6.1

1994

5.0

1968

6.8

1991

7.0

2007

6.4

2007

7.3

2004

6.9

1987

7.6

2002

6.7

2021

7.0

1964

6.5

1981

7.5

1931

6.8

1935

5.0

1980

6.0

1944

7.5

2002

6.3

1992

5.4