2004

7.5

1975

6.5

2000

7.3

2014

5.3

1977

8.1

2011

6.6

1959

6.2

2001

7.5

2011

5.9

2010

6.3

2017

4.2

1976

6.0

1964

5.0

1969

8.0

1964

6.5

1967

7.2

2016

6.0

2016

6.3

2000

5.0

1977

6.4