1968

8.1

1985

7.7

1962

7.9

1983

7.3

2010

5.6

1902

7.9

2018

4.6

2019

7.0

2016

8.0

1999

7.1

1910

6.0

1904

7.2

1986

7.0

2002

6.8

2007

7.0

2013

6.5

2017

5.1

1977

6.1

2005

5.7

2013

6.3