1988

6.8

1996

6.4

1999

7.0

1998

6.7

2005

6.2

2003

6.5

1985

7.7

1960

8.2

2003

7.1

2016

6.7

1953

7.7

2016

3.5

2002

6.7

1971

7.5

2016

4.0

2016

0.0

2016

5.2

2017

6.3

2023

6.6

1944

7.0