1991

5.9

1966

6.5

1970

6.4

2021

6.7

2017

7.2

1964

7.0

2017

5.2

2016

5.5

2005

5.7

2013

7.6

2003

6.8

1987

7.0

2004

5.5

1956

7.1

2016

7.3

2012

7.4

2018

6.1

2008

5.7

1965

6.7

2015

5.9