2005

6.9

2011

5.5

2004

7.0

2021

9.2

6.7

5.6

2016

9.7

2006

5.5

2009

5.1

2014

5.9

2003

5.9

1996

4.0

1985

5.9

2023

7.4

5.7

2020

6.0

2011

7.1

1998

5.5

1950

5.5

1975

5.8