1976

7.6

2014

6.4

2024

7.0

2012

7.1

2005

5.0

2009

4.6

2007

5.2

1999

0.0

2021

6.8

1999

6.2

2007

6.2

1939

7.5

1967

7.6

1986

6.9

2004

6.0

2001

6.8

2005

7.7

1971

5.3

2000

6.5