1984

10.0

2021

9.8

2023

6.1

2015

8.0

2003

8.3

1975

6.3

1993

6.3

2005

6.5

1993

6.5

1992

6.2

2008

5.8

1990

5.5

2009

6.6

2011

9.0

1972

7.4

1999

6.6

2016

5.6

2017

6.6

2017

5.5