2013

6.4

2011

5.5

2015

8.0

2021

6.1

1993

6.5

1996

6.5

1992

6.2

2014

7.0

2001

7.2

2004

6.9

1999

6.6

2025

7.2

2008

5.8

2012

9.4

2023

5.3

1965

6.3

2006

4.6

2008

7.7

1975

6.4

1975

6.1