1991

8.3

1996

7.9

2006

7.4

2017

2.0

1938

6.4

2001

4.8

2019

5.8

2023

8.0

1997

6.5

1999

5.6

1985

6.6

1998

7.1

2004

7.5

2000

6.8

2002

6.8

2021

6.3

2014

6.2

2006

5.5

2005

6.2

1977

8.2