1982

7.2

1978

6.3

2004

6.5

1935

5.6

2007

6.4

2007

7.1

2017

6.1

1996

6.1

1984

5.5

1998

7.1

2006

5.4

2005

6.1

1997

6.6

1998

6.3

2008

6.8

2006

5.1

1997

6.3

1998

6.6

2014

6.8

2016

3.0