1972

7.9

1978

7.6

2016

6.0

2016

7.2

2007

6.9

2015

6.0

2014

6.5

1999

7.5

1994

8.0

1990

6.5

1967

5.5

1994

7.4

1975

7.5

2023

7.0

1960

8.0

1979

7.1

2008

7.3

2012

6.2

1960

8.1

2002

6.1