2017

7.4

2008

5.2

1948

6.6

1943

6.0

1945

7.2

1994

6.7

1953

6.8

2006

6.9

1979

7.0

2005

7.0

2000

7.3

1972

6.8

1969

6.8

1970

7.0

2006

4.4

1997

5.6

2001

4.4

1946

5.9

2014

6.5

1986

3.5