2000

6.2

1988

5.5

1989

5.8

2023

7.9

2016

5.7

2003

7.2

2013

6.6

2012

6.8

2004

7.1

2015

6.0

1988

5.9

2014

6.0

2016

7.7

2010

7.0

2011

6.9

1965

6.7

2010

6.0

2009

7.2

2013

6.2