1968

5.0

1964

5.0

1953

7.2

2011

6.4

2021

6.3

1999

7.6

2016

8.5

2014

7.7

2001

7.9

2005

6.5

2014

7.4

1987

7.2

2016

5.9

1988

6.5

2019

7.8

2020

7.4

1998

6.0

2017

6.1

2016

6.0

2007

7.4