2020

5.8

1994

6.5

1993

5.5

1977

6.7

1967

5.7

2007

6.2

1998

6.5

1966

6.3

2008

7.5

2003

5.8

2010

6.4

2016

6.4

2011

6.1

1974

6.3

2000

5.0

2014

4.5

2004

6.2

2013

6.1

2009

5.9

2002

5.2