1970

6.0

1956

6.2

2020

7.3

2011

5.5

2019

6.7

1985

5.3

2010

6.0

2018

6.0

1990

6.4

1987

5.4

1970

6.3

2014

6.6

2012

5.6

1956

6.9

1984

7.1

2012

5.5

2015

5.7

1957

7.0

2012

7.7

2010

5.6