1922

7.7

1931

7.2

1932

7.3

1998

5.8

2009

5.8

1987

7.1

2018

4.6

2005

7.1

2002

6.7

2001

6.2

1984

7.3

1994

7.4

1977

3.0

2013

4.8

2017

6.3

2001

0.0

2007

6.6

2014

5.1

1988

4.2

2021

5.8