2017

4.6

2006

5.5

1999

6.1

1970

7.4

2021

6.8

1995

7.1

1966

6.7

2004

6.7

1974

7.0

1951

5.7

1975

6.9

1955

7.9

1952

7.0

2006

7.0

2011

6.2

1966

7.2

1946

6.7

1983

7.5

1986

7.8

2006

7.0