1985

6.2

1994

8.7

2010

8.4

1972

8.7

1985

8.3

2017

7.2

2013

8.0

2006

7.4

2015

7.9

2019

8.1

1989

7.2

1980

8.2

2012

7.2

2014

7.9

2009

8.2

1938

7.1

2004

7.2

2021

7.8

2010

7.4

1999

6.9