1999

7.5

1998

7.0

2009

7.8

1983

6.8

2023

10.0

2017

7.6

2017

7.2

1996

7.7

2003

5.6

2005

6.2

1972

7.9

1993

8.0

2006

6.9

1985

6.6

2005

7.7

2002

7.4

2009

6.4

1991

7.2

1960

7.4

2015

8.0