1978

5.1

1996

6.5

1998

6.1

2017

5.7

2016

6.0

2013

6.3

2006

4.1

1966

6.2

2017

6.4

2001

5.2

2012

9.4

1972

6.2

2011

7.8

1984

7.3

2017

4.9

2000

6.7

1998

5.0

2017

5.3

1995

5.6

2020

6.3