2015

6.0

2009

5.6

2018

6.4

2014

5.6

1987

5.3

2016

6.9

2018

5.8

1990

6.6

2010

6.2

1994

6.2

2019

7.2

2020

6.3

1998

6.0

2018

6.8

1941

7.0

1991

6.2

1993

5.8

1994

7.5

2016

7.1

1924

8.1