2001

7.8

1992

8.2

2010

7.5

2017

7.5

2011

6.8

1975

6.9

2023

9.7

1998

6.9

1982

7.6

2007

7.9

1997

8.4

1971

7.8

1999

7.9

2005

7.7

1993

5.6

1995

8.1

1989

8.0

1981

7.2

2012

7.7

2000

7.6