1959

6.1

1994

7.4

1987

5.2

1996

6.5

1996

5.8

2023

8.2

2009

6.2

1988

7.4

1995

5.6

1984

7.0

1968

6.9

2005

4.7

1993

6.5

2000

6.1

2007

5.5

2013

9.6

1981

5.9

2025

4.8

1988

6.1

1976

5.5