2011

6.4

2014

7.0

1971

6.0

1991

6.2

2019

6.5

2012

7.9

1989

5.5

1996

6.9

2003

7.3

1957

8.1

1982

5.2

2018

6.9

2017

6.5

2010

7.0

1999

8.0

1998

6.0

1989

6.2

1991

5.7

1999

8.4

1985

6.7