2001

6.1

1998

6.2

2013

8.4

1999

6.7

2013

8.4

2007

9.8

2023

10.0

1980

5.8

1982

6.9

2004

7.3

2008

5.2

2002

8.4

2003

4.0

2003

7.5

2008

7.5

2009

6.2

1984

6.1

1973

6.8

2014

6.0

2011

5.7