1946

6.0

1971

6.7

1972

7.5

2010

5.2

1984

7.3

2020

6.8

1987

6.9

2015

5.7

2009

7.4

2009

6.7

1991

5.1

2005

7.2

1987

5.2

2015

5.3

2010

7.1

2021

10.0

1939

7.9

2012

6.2

2002

4.7