2007

6.3

2017

6.0

2019

7.6

2019

8.4

1977

6.9

2020

6.6

2017

7.2

2000

6.8

1984

8.6

2001

5.6

2007

5.1

2003

5.9

1975

8.7

1969

7.1

2009

8.3

1959

0.0

2024

6.8

2009

7.9

2009

8.1

2006

6.5