2000

6.3

2010

5.8

2008

6.2

2009

8.5

2011

5.1

1980

6.6

1989

5.6

2018

5.2

2005

7.5

2013

5.7

1996

5.3

2012

6.1

2004

6.5

2025

7.3

2009

5.4

2003

6.4

1952

8.3

2020

7.2

1989

7.9

1989

7.4