2006

7.7

2020

7.4

2012

7.5

2004

7.2

2006

8.0

1993

7.9

2015

6.3

1998

4.8

1999

7.5

1999

7.9

2009

7.5

2015

7.0

2014

8.4

2001

7.6

1977

7.4

1996

5.4

2013

7.0

2016

7.8

1988

8.1

2007

7.5