1995

7.6

1997

6.6

2005

6.5

2006

6.0

2019

6.6

1989

5.7

1984

7.7

2004

6.5

2004

7.2

1964

7.8

1993

6.2

2006

7.4

2023

6.1

2017

6.3

1943

6.5

1984

6.1

1997

5.3

1994

5.8

2009

5.6

2008

5.7