2004

6.4

1997

4.4

2015

10.0

1968

7.4

2000

6.1

2012

5.7

1999

7.7

2011

6.6

2020

6.9

1941

8.0

2019

8.5

2008

7.3

2021

7.9

2023

8.1

2003

7.4

1972

8.7

1987

7.3

2001

6.8

1996

7.9

1989

8.3