2014

5.0

1980

7.1

1978

6.1

1993

7.0

2012

7.7

2011

7.6

2013

6.2

1961

6.9

1969

6.6

2007

7.2

2005

7.2

2005

6.1

1990

6.4

2014

5.6

1946

5.9

1994

6.8

1986

5.8

2014

7.1

2013

5.9

1955

7.2