1972

4.7

1968

7.4

1994

4.1

2009

5.6

2022

6.5

1960

6.8

1988

5.5

1974

5.3

1996

4.9

1995

5.9

1996

4.0

1993

7.0

2006

4.3

2005

6.9

2000

6.1

1995

7.2

2024

10.0

2006

5.2

1996

6.1

1933

7.6