1953

8.0

2006

7.5

1974

8.6

2003

7.2

2014

8.1

1979

7.3

1990

5.7

1985

8.1

1962

7.9

2017

7.0

2008

6.2

2004

7.0

2005

6.6

1999

7.1

2002

6.8

1986

6.7

2015

4.7

2006

5.9

1975

7.3

2023

6.8