2017

4.0

2009

7.0

2007

5.4

1985

6.4

1968

4.8

1986

6.4

1990

7.5

1949

6.9

2021

10.0

2016

6.3

2013

7.1

2007

5.6

2011

7.1

2015

6.4

2006

6.9

2012

6.2

2012

9.3

1896

5.2

1977

8.0