2000

6.9

2017

5.7

2004

8.1

2019

7.7

2001

8.5

1984

7.6

2005

8.9

1963

7.8

2010

7.5

2013

7.7

1993

7.9

2009

7.0

2004

8.0

2008

7.2

1990

7.6

1980

6.1

2015

7.0

2017

6.4

2012

8.1

1989

7.7