1984

7.1

2005

9.9

1995

6.6

2007

7.5

1998

6.1

2010

7.7

2024

9.9

2006

6.9

2001

8.9

2021

5.6

1973

7.6

2012

4.9

1977

5.4

1921

7.2

2011

5.5

1987

7.1

2015

8.0

1989

5.0

2006

7.2