1979

7.8

2005

7.1

2024

9.0

1996

6.4

2004

7.5

1975

7.8

2014

0.0

1999

7.1

1987

6.9

2007

6.5

2005

5.4

2014

6.2

2010

10.0

2018

5.6

1966

5.8

1997

6.6

1999

6.3

2002

6.0

1992

7.0

2012

6.1