2016

7.6

2006

6.4

1984

7.0

2010

7.8

2021

6.2

2013

8.5

2009

8.7

2015

3.6

5.8

1976

4.7

2007

7.7

2021

7.7

1975

4.5

1900

3.0

1968

5.1

2001

5.8

2007

9.8