1999

5.9

2001

9.0

2018

6.0

2012

7.3

2007

6.3

2020

6.5

2004

6.5

1964

6.5

2013

6.5

2015

8.1

2016

6.7

1963

7.0

1987

6.1

2011

4.8

1968

6.4

2006

6.7

2000

5.2

2002

6.5

2006

10.0

1993

6.6