1996

8.0

2014

3.1

1970

5.5

1975

5.8

2019

7.1

2008

6.0

1954

6.2

2007

6.1

2006

7.8

2018

5.6

2014

6.9

2002

7.1

2005

6.3

1928

0.0

1987

6.3

1995

7.6

1990

9.0

1984

2.0

2008

4.8

2009

4.4