2013

4.5

1998

5.1

2005

7.8

2010

6.6

2008

5.1

1999

6.1

1984

6.5

2004

5.9

2013

5.6

2007

5.0

2015

7.5

1961

6.9

2016

7.0

1970

6.3

2020

6.7

2001

9.0

2013

5.7

2013

5.4

2012

5.9

2001

6.6