1931

5.8

5.6

2008

5.4

2020

6.3

2019

8.7

1969

4.7

1967

6.1

2001

6.7

2008

5.8

1977

4.0

2007

7.4

2005

6.0

8.2

0.0

2000

6.1

1994

5.8

2003

6.8

1966

6.3

2017

6.6

2016

7.6