1996

5.3

2025

7.7

2004

6.8

2014

5.8

1993

7.0

2000

6.8

1996

6.7

2014

7.8

2014

6.7

2002

8.6

2006

7.9

2005

7.9

1987

7.2

1994

7.6

1975

7.3

2021

6.6

1951

6.4

2008

6.4

1992

6.8

2016

7.6