2013

6.4

2010

7.0

2008

6.9

2014

5.3

1984

6.5

5.8

6.0

1969

4.9

2023

7.8

2017

6.1

2010

6.5

2019

9.0

2017

6.0

2021

5.2

2003

4.2

1954

6.0

1985

8.0

1995

5.7

1930

6.0

1972

7.3