1985

7.1

2007

6.7

2023

4.5

2001

6.4

1978

5.8

1997

6.8

2007

6.6

2002

6.6

2004

6.4

1931

7.5

1973

5.8

1973

6.7

1957

6.8

1967

6.5

1974

7.5

1964

6.1

1958

6.6

1970

5.8

1981

3.3

2012

6.8