2017

6.6

1998

6.8

1980

7.3

1998

6.6

1974

7.9

1988

7.5

1952

8.1

1981

4.0

2005

7.0

1988

7.8

2003

6.5

1950

8.3

1992

6.7

1995

8.2

1997

7.5

1984

8.1

1994

8.5

1993

7.2

1950

8.1

1997

7.0