1974

7.0

1971

8.1

1987

7.1

1991

5.9

2015

4.5

1891

4.1

2000

5.7

2002

5.8

2005

6.0

1998

5.0

2017

6.8

1993

4.2

1967

7.2

2017

4.3

1969

8.2

1957

4.4

1983

5.3

2005

4.5

1961

6.5

2013

5.0