2004

6.2

2013

7.8

2008

9.0

1997

7.6

1989

6.2

1977

8.2

1949

8.0

1989

7.0

1954

6.7

2009

7.9

2019

8.5

2002

7.6

1959

8.1

2018

8.1

2015

6.8

2013

7.1

1963

8.1

2010

7.3

1980

7.2

1933

7.6