2003

7.8

2006

7.4

1997

6.6

1998

6.8

1997

7.7

1973

6.5

2007

7.3

2004

7.9

1947

6.5

2005

7.1

2012

7.7

1965

4.8

2023

6.3

1984

6.1

1994

5.8

2009

6.3

1951

5.5

2019

6.2

2017

6.4

1989

7.7