2004

8.3

1998

7.2

5.8

1987

7.0

2011

7.5

2016

7.3

2004

7.6

1990

7.8

2001

6.6

2015

6.1

2019

7.2

1993

6.6

2015

7.3

1992

5.8

2001

7.0

2016

7.4

1988

7.0

2003

7.2

2004

8.6

2017

8.1