2010

6.1

1997

7.7

2007

6.3

1995

7.6

2019

8.1

2017

7.6

2013

7.8

2020

7.2

2019

8.5

2019

8.2

1972

8.7

2014

7.9

2021

7.2

2015

7.6

1998

8.1

2016

7.0

1984

7.5

1978

7.6

1994

8.7

2012

7.0