1996

4.8

1986

4.7

2017

7.1

2003

6.0

2004

6.6

2005

5.8

1983

6.3

1988

6.2

1983

4.6

2005

6.8

1984

4.8

2007

7.2

2004

5.5

1980

5.3

2004

7.3

2002

5.4

2008

7.7

2023

6.7

2019

7.3

2014

7.4