2014

7.8

1993

5.5

2015

4.6

1998

7.5

2009

7.5

2012

4.3

1982

5.8

1972

7.4

2010

8.0

2002

4.7

1979

5.2

1993

6.8

2020

7.0

1965

6.3

2017

7.4

2013

8.1

2008

7.4

2008

7.3

1994

6.3

2004

4.7