2006

6.4

2010

7.3

2001

5.2

2007

6.5

2003

6.0

2012

5.8

2005

6.5

1964

7.0

1989

9.3

2014

6.3

2019

6.5

2012

6.5

1983

4.9

1989

9.3

2015

7.8

2011

6.6

1997

4.4

2008

8.5

2013

8.1

2014

6.8