2017

6.9

1966

6.1

1997

6.2

1986

6.4

1987

5.2

2001

6.8

1990

5.5

2017

4.6

1922

7.7

1994

5.3

1986

6.0

1978

6.1

2012

6.1

2020

5.8

1984

7.1

1948

7.0

1975

6.1

2011

6.6

2013

6.1

2008

5.8