2001

8.4

2010

8.2

1997

8.0

1987

7.7

2001

8.0

1999

8.1

1982

7.5

2022

7.6

1999

7.4

2016

7.9

1992

7.0

2007

8.0

2013

7.6

2012

6.8

2001

7.7

1973

8.0

2015

5.3

1997

8.3

2012

8.4

2018

7.8