2017

6.6

2004

7.0

2009

6.0

2011

5.3

2016

7.0

2000

7.4

1987

8.1

1994

8.7

1974

7.5

2019

6.5

2013

7.5

2007

7.8

2000

6.6

1972

8.7

2015

7.6

1943

8.2

1902

7.9

2007

6.7

2019

7.8

2018

8.0