2006

6.3

2017

6.5

2005

7.2

2006

7.6

2000

5.0

2015

6.4

2016

6.6

2015

6.8

1979

6.6

2003

5.5

1992

4.7

1997

6.5

2002

5.8

2005

7.5

2022

6.4

1988

7.3

2007

6.0

2004

5.4

2003

5.3

1998

5.9