2013

5.9

2004

8.3

2010

7.7

2015

7.8

1990

8.2

1964

7.9

2005

7.1

1998

9.2

1974

7.9

2009

7.4

2006

8.1

1999

7.3

1975

7.3

2010

7.7

2013

6.8

2001

6.6

2016

7.1

2007

8.1

2013

7.5

2007

6.8