1975

4.5

2014

6.0

5.2

2021

6.2

1998

6.2

2013

6.1

2021

5.7

5.0

1984

6.5

2023

0.0

2000

7.2

6.4

2015

6.4

2003

6.2

2016

7.4

2006

7.0

1995

5.7

1976

5.9

1976

6.7

2004

5.3