1992

6.8

2002

4.1

2006

6.3

1977

4.0

2007

6.9

2020

6.1

1994

7.5

2005

7.2

2014

6.3

1976

5.9

2003

6.6

2001

7.4

2023

0.0

2014

6.7

2014

6.0

1999

6.0

2016

6.0

2000

6.5

2022

0.0

1999

7.6