2005

7.1

2007

7.0

2024

6.0

2016

5.8

1999

7.4

1984

7.9

1997

8.3

1988

7.9

2000

6.9

2015

8.2

2019

7.2

2019

7.2

2010

5.3

1996

7.3

1989

6.4

2009

7.1

2008

6.4

1981

7.0

1983

5.8

2005

6.5