2004

6.4

1996

8.0

1990

9.0

1975

5.8

1954

6.3

2002

7.1

2007

6.1

1995

7.6

2016

0.0

2014

6.9

1964

0.0

1976

4.7

1977

7.3

2006

5.2

2008

6.0

2014

3.1

2023

10.0

2005

6.3

1928

0.0

2006

7.8