1969

5.1

1971

6.8

2004

7.1

1952

7.0

2016

6.5

1985

5.4

2017

7.9

1986

7.1

2009

5.5

2010

7.7

2004

5.8

2020

6.0

1981

5.3

1986

5.2

2007

4.7

2008

5.7

1994

10.0

1984

6.9

2008

6.3

1959

4.2