1995

7.5

1998

6.0

1991

6.2

1994

6.2

2019

6.5

2011

6.6

2003

6.8

2014

7.0

2016

6.7

2010

6.8

2004

6.4

2022

6.8

2014

8.2

1988

6.4

2010

6.9

2011

6.4

2004

7.3

2015

6.3

2012

5.8

1980

6.4