2006

7.9

2002

7.3

2004

7.3

2007

6.4

2005

7.1

1997

7.2

2002

6.4

1978

7.1

2003

5.6

2012

6.7

1994

7.0

1995

5.4

1984

5.3

2005

5.8

1997

5.4

2011

6.8

1991

6.5

2010

6.8

2014

7.0

2024

5.3