2017

7.7

1994

7.3

1969

6.0

2014

6.0

2000

5.7

1958

7.1

1999

6.8

1984

7.3

1965

7.5

2006

7.0

2016

6.8

1978

6.8

2009

6.7

1951

5.1

1920

7.9

1955

7.8

1995

6.5

1986

7.7

2016

6.5

2019

5.8