2000

6.3

2013

6.7

2025

7.3

1999

5.9

1995

8.2

2004

6.7

2011

6.5

1998

7.5

2020

5.2

1988

7.7

1987

8.0

1996

5.3

2009

6.0

2010

7.4

2007

6.5

2013

6.8

2005

6.6

2005

7.5

2025

7.8

1895

5.4