1987

6.5

2017

7.1

2014

4.3

1999

6.4

2007

7.3

2016

7.3

2008

6.6

2004

6.2

1972

6.2

1976

6.2

2004

8.4

1958

6.4

2020

5.2

1988

4.9

2021

0.0

2001

7.9

2002

7.7

2004

8.0

2005

7.8

2007

7.7