2008

6.2

2008

7.7

2011

7.0

1978

7.1

2003

5.6

2012

6.7

2006

5.8

2004

6.7

1991

6.2

1990

6.7

1993

5.5

2007

5.6

2016

5.2

2017

5.7

2021

4.9

2005

6.1

2014

6.2

1972

6.5

2016

7.6

1966

6.4