2011

7.1

2010

7.2

2023

8.4

2009

6.0

2015

7.5

1993

8.1

2021

6.0

1988

6.5

1990

7.8

2006

9.3

1974

5.9

1979

7.0

2019

8.0

2015

6.7

1977

7.7

2007

5.0

2015

7.0

2008

9.0

2016

8.4