1994

8.5

2003

5.3

2013

5.4

2021

4.0

1992

5.0

1999

5.4

2003

4.8

2005

5.2

1998

5.9

2010

5.9

2000

5.5

1981

5.0

2009

5.8

2014

6.0

2013

4.7

2023

9.0

2014

0.0

1968

1.0

2000

5.8

1961

6.4