1988

6.5

2016

7.0

1984

5.6

1953

7.2

1961

6.9

1992

7.8

2002

7.1

1976

6.4

1980

6.0

1998

5.5

1999

6.4

1980

7.0

1952

7.6

1972

7.0

2005

6.2

1997

8.4

2008

5.9

1961

7.9

1978

6.8

2004

6.3