1949

6.2

1993

5.4

2014

7.1

2001

9.9

1973

9.2

2011

9.5

2013

8.5

2015

5.0

2011

6.4

2011

5.9

2024

8.2

1988

6.4

1994

5.5

2011

7.5

2021

6.1

2010

7.3

2013

8.3

2002

9.1

1985

5.8

1981

6.5