2001

6.1

2017

6.8

2014

7.9

1993

6.9

2006

5.5

1960

8.1

2018

6.6

2018

5.1

2019

6.4

1968

7.3

2017

7.3

2004

6.0

2018

6.1

2014

7.2

2019

4.2

1985

7.7

2014

7.0

2016

6.6

2016

6.2

2020

6.9