1987

7.4

2017

4.7

1956

6.3

2002

5.5

1986

5.9

1994

7.4

2013

6.1

2005

7.3

1935

6.5

1988

7.2

1995

6.8

1993

5.8

2010

7.5

2004

5.8

2013

5.8

2014

7.2

1990

6.3

2018

6.0

1999

9.1

2017

6.1