1994

4.2

2016

5.9

2001

5.6

2003

5.3

2021

7.8

1976

5.5

2011

7.0

1957

7.2

2001

8.9

2021

6.6

2008

7.1

2001

5.8

2002

6.0

2007

6.4

1988

6.0

2010

6.3

2016

6.1

2023

6.5

2023

6.2

2013

7.7