2004

7.8

2002

7.4

1968

6.9

2014

6.7

1975

5.8

1976

4.8

2013

8.0

2004

4.8

2003

6.3

1964

7.0

2009

7.2

2016

7.1

2006

6.0

1967

6.1

1965

6.6

2009

7.1

2011

7.4

2016

6.2

1966

6.3

2011

7.1