1991

7.5

2010

7.1

1990

6.3

2010

6.1

2023

8.4

1999

6.3

1975

4.5

2012

6.2

1989

7.0

2016

10.0

2009

7.6

1983

4.5

2008

6.0

2014

5.6

2005

7.5

2004

7.3

2013

7.2

1974

8.6

1987

5.0

2021

7.4