1999

8.0

2014

5.7

2013

6.5

2013

6.6

2007

6.1

1996

8.1

2010

6.0

2015

7.8

1998

7.5

1999

7.4

2016

6.8

2011

6.7

2012

6.2

1974

6.3

1995

5.7

2021

7.2

1996

5.8

2012

7.3

2006

6.3

1999

7.6