2005

6.7

2007

5.5

2009

6.8

2015

6.1

2009

7.0

2001

7.3

1998

7.2

1994

7.4

1973

7.5

2006

7.6

2017

6.9

1988

7.3

2024

0.0

2018

6.3

1986

7.4

2019

7.1

2008

6.5

1996

6.2

1979

6.0

2014

6.7