1987

6.9

2023

7.1

2002

5.4

2006

5.9

2007

7.1

2007

6.0

1990

6.8

2022

5.5

2006

3.0

1975

8.0

2014

6.3

2019

6.3

2015

2.0

2015

0.0

1957

7.0

1940

8.1

1961

6.7

2001

6.0

2021

5.5

2017

4.6