1970

6.0

2011

6.7

1987

6.4

2019

0.0

1952

7.9

2007

7.5

2001

7.4

1975

8.0

2017

6.6

2018

6.5

2023

0.0

1999

7.2

2008

5.5

2003

7.0

1989

6.6

2008

8.0

1988

7.0

1973

6.3

1999

7.6

1995

6.3