1982

7.5

1994

6.2

2003

7.2

2005

6.9

2017

5.9

1992

6.9

2004

7.9

2024

7.6

2006

6.0

2002

6.3

1987

7.1

1990

6.4

1999

7.3

1973

7.5

1987

7.7

1994

5.9

2001

5.9

1998

5.7

2003

5.4

1995

7.3