2010

6.0

1980

6.7

2017

5.6

2019

6.5

2007

6.4

2013

6.5

1986

5.9

2010

6.5

1978

6.4

1981

5.9

1998

4.8

2001

6.9

1983

6.6

2015

6.4

1988

5.5

1996

6.8

2009

7.8

1995

7.7

1985

6.1

2002

6.5