2016

6.8

2018

7.3

2015

7.8

1988

6.7

1987

7.7

1986

7.5

1987

7.0

2004

8.0

1984

7.0

2007

8.2

2002

7.7

2013

7.3

1993

7.3

2012

8.1

2008

7.5

2003

7.4

2008

8.4

2021

7.9

2016

8.6

2008

8.9