1940

7.1

1990

5.5

2000

6.1

1980

6.4

2010

7.0

2013

7.1

1982

6.4

1994

6.1

2022

4.5

1993

8.0

2004

6.2

2001

6.8

2018

7.1

2013

6.8

2014

6.0

2012

5.8

1999

7.5

2008

6.6

2001

5.1

2017

8.1