1974

7.2

2013

6.3

2005

6.0

2014

6.5

1978

6.6

2011

7.1

1982

7.3

2006

5.4

2002

7.5

1958

6.8

1971

7.2

2002

5.5

1999

7.1

2009

6.7

2004

7.0

2016

5.7

1997

6.9

2009

6.2

1973

7.3

2014

7.4