2017

7.1

1977

8.2

2004

8.6

1994

6.9

2009

7.3

1997

7.7

2012

7.8

2019

6.9

1987

6.6

2008

6.1

1995

7.8

2013

8.1

2002

7.5

2017

7.0

1997

6.6

1991

7.2

1998

7.5

1995

7.6

2007

7.7

2000

7.6