1986

6.8

2002

6.9

2015

7.5

1938

7.1

2006

6.1

1996

8.0

2014

6.4

2008

6.7

2017

6.5

1984

7.5

2006

7.5

1982

7.9

1998

7.2

2000

5.2

1964

7.8

2005

6.1

2016

7.2

1975

8.0

1964

7.6

2005

6.6