1990

9.0

2001

4.4

1996

8.0

1970

5.5

1975

5.8

2007

6.1

2006

7.8

2018

5.6

2008

6.0

2019

7.1

1954

6.2

1995

7.6

1987

6.3

2005

6.3

1984

2.0

2002

7.1

1977

7.3

1928

0.0

2009

6.0

2002

5.9