1970

7.0

1987

7.3

1945

7.7

1955

2.4

2013

6.2

1998

7.3

1999

7.5

2006

7.4

1970

7.1

2000

4.9

1982

4.8

1983

6.0

1998

7.3

2020

6.5

2004

4.9

1951

7.1

2009

7.8

1948

7.6

2008

5.0

1939

5.4