2001

6.7

2015

5.3

2019

6.9

2005

8.3

1977

5.8

2004

5.7

2002

4.6

2023

8.6

2022

5.5

1972

4.0

2024

6.1

2010

5.9

1959

5.5

1965

6.0

1997

6.1

1992

6.3

1972

6.8

1992

7.4

1936

7.3

1937

6.6