1994

6.5

2025

5.5

2021

5.8

2023

5.1

2015

7.2

2002

8.4

2012

7.8

1999

8.4

1999

6.9

2009

7.1

2015

7.1

1989

8.4

1996

7.7

1994

8.5

1974

6.5

1957

8.5

2006

6.4

2010

6.7

2013

7.5

1985

7.7