2003

7.6

2011

7.8

1996

8.1

2014

8.3

2006

7.8

2015

8.3

1997

8.1

2016

7.3

1984

8.5

2000

7.5

1974

7.9

2020

8.0

2021

7.3

2019

7.5

2011

8.5

1966

7.6

2019

7.0

2018

8.4

1999

7.7

2012

7.5