2013

6.8

1996

7.7

2003

7.0

2006

7.2

2014

6.9

1957

6.1

1999

6.7

1989

8.2

2012

6.7

2020

6.8

1999

6.5

2014

7.8

2004

6.6

1976

6.9

1997

9.0

2017

7.0

1992

5.8

2017

8.8

1971

4.8

1996

6.1