2010

6.3

2007

7.6

1998

5.5

2002

7.0

1979

6.1

1976

5.0

2019

6.0

2014

7.0

2020

7.4

2008

7.6

2015

5.1

2010

7.6

1977

6.1

2009

7.6

2007

7.2

1994

4.9

2013

7.3

1989

2.0